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Finding the Fourth Proportional to 391,913.25, 586,872.73 and 258,388.39

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Solution

The fourth proportional to 391,913.25, 586,872.73 and 258,388.39 is: 386,925.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,913.25 : 586,872.73 = 258,388.39 : x
  2. Step 2: Convert to fraction form
    391,913.25/586,872.73 = 258,388.39/x
  3. Step 3: Cross multiply
    391,913.25x = 586,872.73 × 258,388.39
  4. Step 4: Simplify right side
    391,913.25x = 151,641,099,839.61
  5. Step 5: Solve for x
    x = 151,641,099,839.61/391,913.25
  6. Step 6: Final answer
    x = 386,925.17

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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.