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Finding the Fourth Proportional to 719,490.35, 992,870.65 and 397,193.53

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Solution

The fourth proportional to 719,490.35, 992,870.65 and 397,193.53 is: 548,112.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,490.35 : 992,870.65 = 397,193.53 : x
  2. Step 2: Convert to fraction form
    719,490.35/992,870.65 = 397,193.53/x
  3. Step 3: Cross multiply
    719,490.35x = 992,870.65 × 397,193.53
  4. Step 4: Simplify right side
    719,490.35x = 394,361,798,306.90
  5. Step 5: Solve for x
    x = 394,361,798,306.90/719,490.35
  6. Step 6: Final answer
    x = 548,112.70

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1.5x scale

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.