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Finding the Fourth Proportional to 315,329.62, 435,156.18 and 172,092.70

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Solution

The fourth proportional to 315,329.62, 435,156.18 and 172,092.70 is: 237,488.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,329.62 : 435,156.18 = 172,092.70 : x
  2. Step 2: Convert to fraction form
    315,329.62/435,156.18 = 172,092.70/x
  3. Step 3: Cross multiply
    315,329.62x = 435,156.18 × 172,092.70
  4. Step 4: Simplify right side
    315,329.62x = 74,887,201,937.89
  5. Step 5: Solve for x
    x = 74,887,201,937.89/315,329.62
  6. Step 6: Final answer
    x = 237,488.64

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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.