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Finding the Fourth Proportional to 606,505.20, 908,445.60 and 393,928.80

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Solution

The fourth proportional to 606,505.20, 908,445.60 and 393,928.80 is: 590,040.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    606,505.20 : 908,445.60 = 393,928.80 : x
  2. Step 2: Convert to fraction form
    606,505.20/908,445.60 = 393,928.80/x
  3. Step 3: Cross multiply
    606,505.20x = 908,445.60 × 393,928.80
  4. Step 4: Simplify right side
    606,505.20x = 357,862,885,073.28
  5. Step 5: Solve for x
    x = 357,862,885,073.28/606,505.20
  6. Step 6: Final answer
    x = 590,040.92

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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.