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Finding the Fourth Proportional to 499,541.28, 689,448.40 and 371,331.28

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Solution

The fourth proportional to 499,541.28, 689,448.40 and 371,331.28 is: 512,497.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,541.28 : 689,448.40 = 371,331.28 : x
  2. Step 2: Convert to fraction form
    499,541.28/689,448.40 = 371,331.28/x
  3. Step 3: Cross multiply
    499,541.28x = 689,448.40 × 371,331.28
  4. Step 4: Simplify right side
    499,541.28x = 256,013,756,865.95
  5. Step 5: Solve for x
    x = 256,013,756,865.95/499,541.28
  6. Step 6: Final answer
    x = 512,497.70

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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.