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Finding the Fourth Proportional to 861,318.68, 1,188,618 and 534,510

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Solution

The fourth proportional to 861,318.68, 1,188,618 and 534,510 is: 737,622.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,318.68 : 1,188,618 = 534,510 : x
  2. Step 2: Convert to fraction form
    861,318.68/1,188,618 = 534,510/x
  3. Step 3: Cross multiply
    861,318.68x = 1,188,618 × 534,510
  4. Step 4: Simplify right side
    861,318.68x = 635,328,207,180
  5. Step 5: Solve for x
    x = 635,328,207,180/861,318.68
  6. Step 6: Final answer
    x = 737,622.70

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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.