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Finding the Fourth Proportional to 659,326.40, 988,557.60 and 259,726.40

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Solution

The fourth proportional to 659,326.40, 988,557.60 and 259,726.40 is: 389,419.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,326.40 : 988,557.60 = 259,726.40 : x
  2. Step 2: Convert to fraction form
    659,326.40/988,557.60 = 259,726.40/x
  3. Step 3: Cross multiply
    659,326.40x = 988,557.60 × 259,726.40
  4. Step 4: Simplify right side
    659,326.40x = 256,754,506,640.64
  5. Step 5: Solve for x
    x = 256,754,506,640.64/659,326.40
  6. Step 6: Final answer
    x = 389,419.42

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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.