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Finding the Fourth Proportional to 417,998.80, 626,998.20 and 409,704.40

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Solution

The fourth proportional to 417,998.80, 626,998.20 and 409,704.40 is: 614,556.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    417,998.80 : 626,998.20 = 409,704.40 : x
  2. Step 2: Convert to fraction form
    417,998.80/626,998.20 = 409,704.40/x
  3. Step 3: Cross multiply
    417,998.80x = 626,998.20 × 409,704.40
  4. Step 4: Simplify right side
    417,998.80x = 256,883,921,332.08
  5. Step 5: Solve for x
    x = 256,883,921,332.08/417,998.80
  6. Step 6: Final answer
    x = 614,556.60

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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.