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Finding the Fourth Proportional to 43,247.20, 64,870.80 and 28,472.80

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Solution

The fourth proportional to 43,247.20, 64,870.80 and 28,472.80 is: 42,709.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,247.20 : 64,870.80 = 28,472.80 : x
  2. Step 2: Convert to fraction form
    43,247.20/64,870.80 = 28,472.80/x
  3. Step 3: Cross multiply
    43,247.20x = 64,870.80 × 28,472.80
  4. Step 4: Simplify right side
    43,247.20x = 1,847,053,314.24
  5. Step 5: Solve for x
    x = 1,847,053,314.24/43,247.20
  6. Step 6: Final answer
    x = 42,709.20

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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.