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Finding the Fourth Proportional to 315,658.50, 435,606.15 and 172,418.58

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Solution

The fourth proportional to 315,658.50, 435,606.15 and 172,418.58 is: 237,936.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,658.50 : 435,606.15 = 172,418.58 : x
  2. Step 2: Convert to fraction form
    315,658.50/435,606.15 = 172,418.58/x
  3. Step 3: Cross multiply
    315,658.50x = 435,606.15 × 172,418.58
  4. Step 4: Simplify right side
    315,658.50x = 75,106,593,822.27
  5. Step 5: Solve for x
    x = 75,106,593,822.27/315,658.50
  6. Step 6: Final answer
    x = 237,936.23

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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.