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Finding the Fourth Proportional to 40,408, 55,818.08 and 38,439.36

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Solution

The fourth proportional to 40,408, 55,818.08 and 38,439.36 is: 53,098.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,408 : 55,818.08 = 38,439.36 : x
  2. Step 2: Convert to fraction form
    40,408/55,818.08 = 38,439.36/x
  3. Step 3: Cross multiply
    40,408x = 55,818.08 × 38,439.36
  4. Step 4: Simplify right side
    40,408x = 2,145,611,271.63
  5. Step 5: Solve for x
    x = 2,145,611,271.63/40,408
  6. Step 6: Final answer
    x = 53,098.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.