Home / 721,117.40-1,081,360.44-342,146.18

Finding the Fourth Proportional to 721,117.40, 1,081,360.44 and 342,146.18

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Solution

The fourth proportional to 721,117.40, 1,081,360.44 and 342,146.18 is: 513,069.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,117.40 : 1,081,360.44 = 342,146.18 : x
  2. Step 2: Convert to fraction form
    721,117.40/1,081,360.44 = 342,146.18/x
  3. Step 3: Cross multiply
    721,117.40x = 1,081,360.44 × 342,146.18
  4. Step 4: Simplify right side
    721,117.40x = 369,983,343,749.12
  5. Step 5: Solve for x
    x = 369,983,343,749.12/721,117.40
  6. Step 6: Final answer
    x = 513,069.50

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Half scale
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Double scale
Find fourth proportional to 721,118.40, 1,081,361.94 and 342,147.18
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.