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Finding the Fourth Proportional to 315,436.17, 435,295.89 and 172,197.21

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Solution

The fourth proportional to 315,436.17, 435,295.89 and 172,197.21 is: 237,628.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,436.17 : 435,295.89 = 172,197.21 : x
  2. Step 2: Convert to fraction form
    315,436.17/435,295.89 = 172,197.21/x
  3. Step 3: Cross multiply
    315,436.17x = 435,295.89 × 172,197.21
  4. Step 4: Simplify right side
    315,436.17x = 74,956,737,782.47
  5. Step 5: Solve for x
    x = 74,956,737,782.47/315,436.17
  6. Step 6: Final answer
    x = 237,628.86

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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.