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Finding the Fourth Proportional to 372,665.70, 558,998.55 and 353,420.10

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Solution

The fourth proportional to 372,665.70, 558,998.55 and 353,420.10 is: 530,130.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,665.70 : 558,998.55 = 353,420.10 : x
  2. Step 2: Convert to fraction form
    372,665.70/558,998.55 = 353,420.10/x
  3. Step 3: Cross multiply
    372,665.70x = 558,998.55 × 353,420.10
  4. Step 4: Simplify right side
    372,665.70x = 197,561,323,440.86
  5. Step 5: Solve for x
    x = 197,561,323,440.86/372,665.70
  6. Step 6: Final answer
    x = 530,130.15

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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.