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Finding the Fourth Proportional to 315,484.92, 435,352.59 and 172,217.25

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Solution

The fourth proportional to 315,484.92, 435,352.59 and 172,217.25 is: 237,650.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,484.92 : 435,352.59 = 172,217.25 : x
  2. Step 2: Convert to fraction form
    315,484.92/435,352.59 = 172,217.25/x
  3. Step 3: Cross multiply
    315,484.92x = 435,352.59 × 172,217.25
  4. Step 4: Simplify right side
    315,484.92x = 74,975,225,830.18
  5. Step 5: Solve for x
    x = 74,975,225,830.18/315,484.92
  6. Step 6: Final answer
    x = 237,650.74

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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.