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Finding the Fourth Proportional to 315,587.07, 435,511.76 and 172,347.12

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Solution

The fourth proportional to 315,587.07, 435,511.76 and 172,347.12 is: 237,839.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,587.07 : 435,511.76 = 172,347.12 : x
  2. Step 2: Convert to fraction form
    315,587.07/435,511.76 = 172,347.12/x
  3. Step 3: Cross multiply
    315,587.07x = 435,511.76 × 172,347.12
  4. Step 4: Simplify right side
    315,587.07x = 75,059,196,700.40
  5. Step 5: Solve for x
    x = 75,059,196,700.40/315,587.07
  6. Step 6: Final answer
    x = 237,839.90

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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.