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Finding the Fourth Proportional to 287,670.62, 431,206.49 and 161,125.34

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Solution

The fourth proportional to 287,670.62, 431,206.49 and 161,125.34 is: 241,520.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,670.62 : 431,206.49 = 161,125.34 : x
  2. Step 2: Convert to fraction form
    287,670.62/431,206.49 = 161,125.34/x
  3. Step 3: Cross multiply
    287,670.62x = 431,206.49 × 161,125.34
  4. Step 4: Simplify right side
    287,670.62x = 69,478,292,311.46
  5. Step 5: Solve for x
    x = 69,478,292,311.46/287,670.62
  6. Step 6: Final answer
    x = 241,520.29

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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.