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Finding the Fourth Proportional to 671,620.10, 1,007,430.15 and 519,404.90

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Solution

The fourth proportional to 671,620.10, 1,007,430.15 and 519,404.90 is: 779,107.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,620.10 : 1,007,430.15 = 519,404.90 : x
  2. Step 2: Convert to fraction form
    671,620.10/1,007,430.15 = 519,404.90/x
  3. Step 3: Cross multiply
    671,620.10x = 1,007,430.15 × 519,404.90
  4. Step 4: Simplify right side
    671,620.10x = 523,264,156,317.74
  5. Step 5: Solve for x
    x = 523,264,156,317.74/671,620.10
  6. Step 6: Final answer
    x = 779,107.35

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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.