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Finding the Fourth Proportional to 308,000.48, 425,036.10 and 172,036.40

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Solution

The fourth proportional to 308,000.48, 425,036.10 and 172,036.40 is: 237,407.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,000.48 : 425,036.10 = 172,036.40 : x
  2. Step 2: Convert to fraction form
    308,000.48/425,036.10 = 172,036.40/x
  3. Step 3: Cross multiply
    308,000.48x = 425,036.10 × 172,036.40
  4. Step 4: Simplify right side
    308,000.48x = 73,121,679,451.45
  5. Step 5: Solve for x
    x = 73,121,679,451.45/308,000.48
  6. Step 6: Final answer
    x = 237,407.68

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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.