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Finding the Fourth Proportional to 715,093.84, 986,781 and 392,817.52

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Solution

The fourth proportional to 715,093.84, 986,781 and 392,817.52 is: 542,061.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,093.84 : 986,781 = 392,817.52 : x
  2. Step 2: Convert to fraction form
    715,093.84/986,781 = 392,817.52/x
  3. Step 3: Cross multiply
    715,093.84x = 986,781 × 392,817.52
  4. Step 4: Simplify right side
    715,093.84x = 387,624,865,203.12
  5. Step 5: Solve for x
    x = 387,624,865,203.12/715,093.84
  6. Step 6: Final answer
    x = 542,061.54

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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.