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Finding the Fourth Proportional to 988,859.88, 1,364,398.02 and 667,166.76

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Solution

The fourth proportional to 988,859.88, 1,364,398.02 and 667,166.76 is: 920,535.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    988,859.88 : 1,364,398.02 = 667,166.76 : x
  2. Step 2: Convert to fraction form
    988,859.88/1,364,398.02 = 667,166.76/x
  3. Step 3: Cross multiply
    988,859.88x = 1,364,398.02 × 667,166.76
  4. Step 4: Simplify right side
    988,859.88x = 910,281,006,353.82
  5. Step 5: Solve for x
    x = 910,281,006,353.82/988,859.88
  6. Step 6: Final answer
    x = 920,535.89

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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.