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Finding the Fourth Proportional to 611,793.90, 917,690.85 and 521,252.10

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Solution

The fourth proportional to 611,793.90, 917,690.85 and 521,252.10 is: 781,878.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,793.90 : 917,690.85 = 521,252.10 : x
  2. Step 2: Convert to fraction form
    611,793.90/917,690.85 = 521,252.10/x
  3. Step 3: Cross multiply
    611,793.90x = 917,690.85 × 521,252.10
  4. Step 4: Simplify right side
    611,793.90x = 478,348,282,713.29
  5. Step 5: Solve for x
    x = 478,348,282,713.29/611,793.90
  6. Step 6: Final answer
    x = 781,878.15

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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.