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Finding the Fourth Proportional to 379,872.34, 570,002.91 and 155,398.66

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Solution

The fourth proportional to 379,872.34, 570,002.91 and 155,398.66 is: 233,177.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,872.34 : 570,002.91 = 155,398.66 : x
  2. Step 2: Convert to fraction form
    379,872.34/570,002.91 = 155,398.66/x
  3. Step 3: Cross multiply
    379,872.34x = 570,002.91 × 155,398.66
  4. Step 4: Simplify right side
    379,872.34x = 88,577,688,410.10
  5. Step 5: Solve for x
    x = 88,577,688,410.10/379,872.34
  6. Step 6: Final answer
    x = 233,177.52

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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.