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Finding the Fourth Proportional to 40,385.20, 60,588.60 and 28,721.20

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Solution

The fourth proportional to 40,385.20, 60,588.60 and 28,721.20 is: 43,089.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,385.20 : 60,588.60 = 28,721.20 : x
  2. Step 2: Convert to fraction form
    40,385.20/60,588.60 = 28,721.20/x
  3. Step 3: Cross multiply
    40,385.20x = 60,588.60 × 28,721.20
  4. Step 4: Simplify right side
    40,385.20x = 1,740,177,298.32
  5. Step 5: Solve for x
    x = 1,740,177,298.32/40,385.20
  6. Step 6: Final answer
    x = 43,089.48

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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.