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Finding the Fourth Proportional to 372,128.80, 558,020.40 and 161,658.40

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Solution

The fourth proportional to 372,128.80, 558,020.40 and 161,658.40 is: 242,412.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,128.80 : 558,020.40 = 161,658.40 : x
  2. Step 2: Convert to fraction form
    372,128.80/558,020.40 = 161,658.40/x
  3. Step 3: Cross multiply
    372,128.80x = 558,020.40 × 161,658.40
  4. Step 4: Simplify right side
    372,128.80x = 90,208,685,031.36
  5. Step 5: Solve for x
    x = 90,208,685,031.36/372,128.80
  6. Step 6: Final answer
    x = 242,412.53

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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.