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Finding the Fourth Proportional to 372,135.40, 558,203.10 and 355,028.20

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Solution

The fourth proportional to 372,135.40, 558,203.10 and 355,028.20 is: 532,542.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,135.40 : 558,203.10 = 355,028.20 : x
  2. Step 2: Convert to fraction form
    372,135.40/558,203.10 = 355,028.20/x
  3. Step 3: Cross multiply
    372,135.40x = 558,203.10 × 355,028.20
  4. Step 4: Simplify right side
    372,135.40x = 198,177,841,827.42
  5. Step 5: Solve for x
    x = 198,177,841,827.42/372,135.40
  6. Step 6: Final answer
    x = 532,542.30

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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.