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Finding the Fourth Proportional to 620,999.70, 931,499.55 and 355,279.20

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Solution

The fourth proportional to 620,999.70, 931,499.55 and 355,279.20 is: 532,918.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,999.70 : 931,499.55 = 355,279.20 : x
  2. Step 2: Convert to fraction form
    620,999.70/931,499.55 = 355,279.20/x
  3. Step 3: Cross multiply
    620,999.70x = 931,499.55 × 355,279.20
  4. Step 4: Simplify right side
    620,999.70x = 330,942,414,924.36
  5. Step 5: Solve for x
    x = 330,942,414,924.36/620,999.70
  6. Step 6: Final answer
    x = 532,918.80

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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.