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Finding the Fourth Proportional to 40,439.40, 56,731.80 and 40,439.40

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Solution

The fourth proportional to 40,439.40, 56,731.80 and 40,439.40 is: 56,731.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,439.40 : 56,731.80 = 40,439.40 : x
  2. Step 2: Convert to fraction form
    40,439.40/56,731.80 = 40,439.40/x
  3. Step 3: Cross multiply
    40,439.40x = 56,731.80 × 40,439.40
  4. Step 4: Simplify right side
    40,439.40x = 2,294,199,952.92
  5. Step 5: Solve for x
    x = 2,294,199,952.92/40,439.40
  6. Step 6: Final answer
    x = 56,731.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.