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Finding the Fourth Proportional to 639,046.90, 957,403.95 and 520,074.10

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Solution

The fourth proportional to 639,046.90, 957,403.95 and 520,074.10 is: 779,161.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,046.90 : 957,403.95 = 520,074.10 : x
  2. Step 2: Convert to fraction form
    639,046.90/957,403.95 = 520,074.10/x
  3. Step 3: Cross multiply
    639,046.90x = 957,403.95 × 520,074.10
  4. Step 4: Simplify right side
    639,046.90x = 497,920,997,632.70
  5. Step 5: Solve for x
    x = 497,920,997,632.70/639,046.90
  6. Step 6: Final answer
    x = 779,161.90

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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.