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Finding the Fourth Proportional to 306,636.80, 423,158.08 and 172,500.80

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Solution

The fourth proportional to 306,636.80, 423,158.08 and 172,500.80 is: 238,050.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,636.80 : 423,158.08 = 172,500.80 : x
  2. Step 2: Convert to fraction form
    306,636.80/423,158.08 = 172,500.80/x
  3. Step 3: Cross multiply
    306,636.80x = 423,158.08 × 172,500.80
  4. Step 4: Simplify right side
    306,636.80x = 72,995,107,326.46
  5. Step 5: Solve for x
    x = 72,995,107,326.46/306,636.80
  6. Step 6: Final answer
    x = 238,050.71

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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.