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Finding the Fourth Proportional to 387,098.89, 580,648.10 and 120,882.21

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Solution

The fourth proportional to 387,098.89, 580,648.10 and 120,882.21 is: 181,323.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,098.89 : 580,648.10 = 120,882.21 : x
  2. Step 2: Convert to fraction form
    387,098.89/580,648.10 = 120,882.21/x
  3. Step 3: Cross multiply
    387,098.89x = 580,648.10 × 120,882.21
  4. Step 4: Simplify right side
    387,098.89x = 70,190,024,955.89
  5. Step 5: Solve for x
    x = 70,190,024,955.89/387,098.89
  6. Step 6: Final answer
    x = 181,323.24

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1.5x scale

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.