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Finding the Fourth Proportional to 315,587.10, 435,503.28 and 172,347.72

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Solution

The fourth proportional to 315,587.10, 435,503.28 and 172,347.72 is: 237,836.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,587.10 : 435,503.28 = 172,347.72 : x
  2. Step 2: Convert to fraction form
    315,587.10/435,503.28 = 172,347.72/x
  3. Step 3: Cross multiply
    315,587.10x = 435,503.28 × 172,347.72
  4. Step 4: Simplify right side
    315,587.10x = 75,057,997,360.52
  5. Step 5: Solve for x
    x = 75,057,997,360.52/315,587.10
  6. Step 6: Final answer
    x = 237,836.08

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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.