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Finding the Fourth Proportional to 485,412.40, 727,600.20 and 185,777.20

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Solution

The fourth proportional to 485,412.40, 727,600.20 and 185,777.20 is: 278,467.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,412.40 : 727,600.20 = 185,777.20 : x
  2. Step 2: Convert to fraction form
    485,412.40/727,600.20 = 185,777.20/x
  3. Step 3: Cross multiply
    485,412.40x = 727,600.20 × 185,777.20
  4. Step 4: Simplify right side
    485,412.40x = 135,171,527,875.44
  5. Step 5: Solve for x
    x = 135,171,527,875.44/485,412.40
  6. Step 6: Final answer
    x = 278,467.40

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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.