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Finding the Fourth Proportional to 515,153.28, 711,256.68 and 321,855.24

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Solution

The fourth proportional to 515,153.28, 711,256.68 and 321,855.24 is: 444,375.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,153.28 : 711,256.68 = 321,855.24 : x
  2. Step 2: Convert to fraction form
    515,153.28/711,256.68 = 321,855.24/x
  3. Step 3: Cross multiply
    515,153.28x = 711,256.68 × 321,855.24
  4. Step 4: Simplify right side
    515,153.28x = 228,921,689,443.00
  5. Step 5: Solve for x
    x = 228,921,689,443.00/515,153.28
  6. Step 6: Final answer
    x = 444,375.87

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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.