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Finding the Fourth Proportional to 659,013.66, 988,326.71 and 279,931.38

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Solution

The fourth proportional to 659,013.66, 988,326.71 and 279,931.38 is: 419,814.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,013.66 : 988,326.71 = 279,931.38 : x
  2. Step 2: Convert to fraction form
    659,013.66/988,326.71 = 279,931.38/x
  3. Step 3: Cross multiply
    659,013.66x = 988,326.71 × 279,931.38
  4. Step 4: Simplify right side
    659,013.66x = 276,663,659,821.16
  5. Step 5: Solve for x
    x = 276,663,659,821.16/659,013.66
  6. Step 6: Final answer
    x = 419,814.76

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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.