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Finding the Fourth Proportional to 514,754.79, 771,868.89 and 215,153.61

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Solution

The fourth proportional to 514,754.79, 771,868.89 and 215,153.61 is: 322,620.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    514,754.79 : 771,868.89 = 215,153.61 : x
  2. Step 2: Convert to fraction form
    514,754.79/771,868.89 = 215,153.61/x
  3. Step 3: Cross multiply
    514,754.79x = 771,868.89 × 215,153.61
  4. Step 4: Simplify right side
    514,754.79x = 166,070,378,130.19
  5. Step 5: Solve for x
    x = 166,070,378,130.19/514,754.79
  6. Step 6: Final answer
    x = 322,620.36

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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.