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Finding the Fourth Proportional to 639,061.90, 957,426.45 and 520,089.10

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Solution

The fourth proportional to 639,061.90, 957,426.45 and 520,089.10 is: 779,184.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,061.90 : 957,426.45 = 520,089.10 : x
  2. Step 2: Convert to fraction form
    639,061.90/957,426.45 = 520,089.10/x
  3. Step 3: Cross multiply
    639,061.90x = 957,426.45 × 520,089.10
  4. Step 4: Simplify right side
    639,061.90x = 497,947,060,696.70
  5. Step 5: Solve for x
    x = 497,947,060,696.70/639,061.90
  6. Step 6: Final answer
    x = 779,184.40

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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.