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Finding the Fourth Proportional to 693,140.90, 956,523.90 and 387,221.66

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Solution

The fourth proportional to 693,140.90, 956,523.90 and 387,221.66 is: 534,360.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,140.90 : 956,523.90 = 387,221.66 : x
  2. Step 2: Convert to fraction form
    693,140.90/956,523.90 = 387,221.66/x
  3. Step 3: Cross multiply
    693,140.90x = 956,523.90 × 387,221.66
  4. Step 4: Simplify right side
    693,140.90x = 370,386,772,387.67
  5. Step 5: Solve for x
    x = 370,386,772,387.67/693,140.90
  6. Step 6: Final answer
    x = 534,360.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.