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Finding the Fourth Proportional to 574,430.20, 861,645.30 and 455,457.40

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Solution

The fourth proportional to 574,430.20, 861,645.30 and 455,457.40 is: 683,186.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    574,430.20 : 861,645.30 = 455,457.40 : x
  2. Step 2: Convert to fraction form
    574,430.20/861,645.30 = 455,457.40/x
  3. Step 3: Cross multiply
    574,430.20x = 861,645.30 × 455,457.40
  4. Step 4: Simplify right side
    574,430.20x = 392,442,728,060.22
  5. Step 5: Solve for x
    x = 392,442,728,060.22/574,430.20
  6. Step 6: Final answer
    x = 683,186.10

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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.