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Finding the Fourth Proportional to 668,332.16, 921,889.84 and 396,217.76

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Solution

The fourth proportional to 668,332.16, 921,889.84 and 396,217.76 is: 546,538.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,332.16 : 921,889.84 = 396,217.76 : x
  2. Step 2: Convert to fraction form
    668,332.16/921,889.84 = 396,217.76/x
  3. Step 3: Cross multiply
    668,332.16x = 921,889.84 × 396,217.76
  4. Step 4: Simplify right side
    668,332.16x = 365,269,127,371.56
  5. Step 5: Solve for x
    x = 365,269,127,371.56/668,332.16
  6. Step 6: Final answer
    x = 546,538.31

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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.