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Finding the Fourth Proportional to 315,743.32, 435,727.38 and 172,505.89

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Solution

The fourth proportional to 315,743.32, 435,727.38 and 172,505.89 is: 238,059.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,743.32 : 435,727.38 = 172,505.89 : x
  2. Step 2: Convert to fraction form
    315,743.32/435,727.38 = 172,505.89/x
  3. Step 3: Cross multiply
    315,743.32x = 435,727.38 × 172,505.89
  4. Step 4: Simplify right side
    315,743.32x = 75,165,539,484.27
  5. Step 5: Solve for x
    x = 75,165,539,484.27/315,743.32
  6. Step 6: Final answer
    x = 238,059.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.