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Finding the Fourth Proportional to 298,913.28, 448,395.52 and 85,681.92

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Solution

The fourth proportional to 298,913.28, 448,395.52 and 85,681.92 is: 128,530.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,913.28 : 448,395.52 = 85,681.92 : x
  2. Step 2: Convert to fraction form
    298,913.28/448,395.52 = 85,681.92/x
  3. Step 3: Cross multiply
    298,913.28x = 448,395.52 × 85,681.92
  4. Step 4: Simplify right side
    298,913.28x = 38,419,389,073.00
  5. Step 5: Solve for x
    x = 38,419,389,073.00/298,913.28
  6. Step 6: Final answer
    x = 128,530.22

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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.