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Finding the Fourth Proportional to 438,323.90, 656,999.85 and 171,995.90

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Solution

The fourth proportional to 438,323.90, 656,999.85 and 171,995.90 is: 257,803.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,323.90 : 656,999.85 = 171,995.90 : x
  2. Step 2: Convert to fraction form
    438,323.90/656,999.85 = 171,995.90/x
  3. Step 3: Cross multiply
    438,323.90x = 656,999.85 × 171,995.90
  4. Step 4: Simplify right side
    438,323.90x = 113,001,280,500.62
  5. Step 5: Solve for x
    x = 113,001,280,500.62/438,323.90
  6. Step 6: Final answer
    x = 257,803.15

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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.