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Finding the Fourth Proportional to 315,451.40, 435,329.52 and 172,217.48

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Solution

The fourth proportional to 315,451.40, 435,329.52 and 172,217.48 is: 237,663.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,451.40 : 435,329.52 = 172,217.48 : x
  2. Step 2: Convert to fraction form
    315,451.40/435,329.52 = 172,217.48/x
  3. Step 3: Cross multiply
    315,451.40x = 435,329.52 × 172,217.48
  4. Step 4: Simplify right side
    315,451.40x = 74,971,352,904.01
  5. Step 5: Solve for x
    x = 74,971,352,904.01/315,451.40
  6. Step 6: Final answer
    x = 237,663.72

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1.5x scale

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.