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Finding the Fourth Proportional to 40,606.20, 60,909.30 and 28,140.30

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Solution

The fourth proportional to 40,606.20, 60,909.30 and 28,140.30 is: 42,210.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,606.20 : 60,909.30 = 28,140.30 : x
  2. Step 2: Convert to fraction form
    40,606.20/60,909.30 = 28,140.30/x
  3. Step 3: Cross multiply
    40,606.20x = 60,909.30 × 28,140.30
  4. Step 4: Simplify right side
    40,606.20x = 1,714,005,974.79
  5. Step 5: Solve for x
    x = 1,714,005,974.79/40,606.20
  6. Step 6: Final answer
    x = 42,210.45

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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.