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Finding the Fourth Proportional to 387,621.44, 581,309.28 and 124,904

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Solution

The fourth proportional to 387,621.44, 581,309.28 and 124,904 is: 187,316.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,621.44 : 581,309.28 = 124,904 : x
  2. Step 2: Convert to fraction form
    387,621.44/581,309.28 = 124,904/x
  3. Step 3: Cross multiply
    387,621.44x = 581,309.28 × 124,904
  4. Step 4: Simplify right side
    387,621.44x = 72,607,854,309.12
  5. Step 5: Solve for x
    x = 72,607,854,309.12/387,621.44
  6. Step 6: Final answer
    x = 187,316.40

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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.