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Finding the Fourth Proportional to 423,979.80, 635,969.70 and 187,200.60

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Solution

The fourth proportional to 423,979.80, 635,969.70 and 187,200.60 is: 280,800.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,979.80 : 635,969.70 = 187,200.60 : x
  2. Step 2: Convert to fraction form
    423,979.80/635,969.70 = 187,200.60/x
  3. Step 3: Cross multiply
    423,979.80x = 635,969.70 × 187,200.60
  4. Step 4: Simplify right side
    423,979.80x = 119,053,909,421.82
  5. Step 5: Solve for x
    x = 119,053,909,421.82/423,979.80
  6. Step 6: Final answer
    x = 280,800.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.