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Finding the Fourth Proportional to 479,714, 661,389.96 and 393,354.80

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Solution

The fourth proportional to 479,714, 661,389.96 and 393,354.80 is: 542,325.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,714 : 661,389.96 = 393,354.80 : x
  2. Step 2: Convert to fraction form
    479,714/661,389.96 = 393,354.80/x
  3. Step 3: Cross multiply
    479,714x = 661,389.96 × 393,354.80
  4. Step 4: Simplify right side
    479,714x = 260,160,915,437.81
  5. Step 5: Solve for x
    x = 260,160,915,437.81/479,714
  6. Step 6: Final answer
    x = 542,325.04

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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.