Home / 638,746.40-881,451.12-352,266.40

Finding the Fourth Proportional to 638,746.40, 881,451.12 and 352,266.40

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Solution

The fourth proportional to 638,746.40, 881,451.12 and 352,266.40 is: 486,117.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,746.40 : 881,451.12 = 352,266.40 : x
  2. Step 2: Convert to fraction form
    638,746.40/881,451.12 = 352,266.40/x
  3. Step 3: Cross multiply
    638,746.40x = 881,451.12 × 352,266.40
  4. Step 4: Simplify right side
    638,746.40x = 310,505,612,818.37
  5. Step 5: Solve for x
    x = 310,505,612,818.37/638,746.40
  6. Step 6: Final answer
    x = 486,117.20

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.