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Finding the Fourth Proportional to 387,672, 581,508 and 103,363.52

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Solution

The fourth proportional to 387,672, 581,508 and 103,363.52 is: 155,045.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,672 : 581,508 = 103,363.52 : x
  2. Step 2: Convert to fraction form
    387,672/581,508 = 103,363.52/x
  3. Step 3: Cross multiply
    387,672x = 581,508 × 103,363.52
  4. Step 4: Simplify right side
    387,672x = 60,106,713,788.16
  5. Step 5: Solve for x
    x = 60,106,713,788.16/387,672
  6. Step 6: Final answer
    x = 155,045.28

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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.