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Finding the Fourth Proportional to 659,331.60, 988,900.20 and 186,064.80

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Solution

The fourth proportional to 659,331.60, 988,900.20 and 186,064.80 is: 279,069.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,331.60 : 988,900.20 = 186,064.80 : x
  2. Step 2: Convert to fraction form
    659,331.60/988,900.20 = 186,064.80/x
  3. Step 3: Cross multiply
    659,331.60x = 988,900.20 × 186,064.80
  4. Step 4: Simplify right side
    659,331.60x = 183,999,517,932.96
  5. Step 5: Solve for x
    x = 183,999,517,932.96/659,331.60
  6. Step 6: Final answer
    x = 279,069.77

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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.