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Finding the Fourth Proportional to 659,704.80, 988,283.88 and 393,678.12

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Solution

The fourth proportional to 659,704.80, 988,283.88 and 393,678.12 is: 589,757.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,704.80 : 988,283.88 = 393,678.12 : x
  2. Step 2: Convert to fraction form
    659,704.80/988,283.88 = 393,678.12/x
  3. Step 3: Cross multiply
    659,704.80x = 988,283.88 × 393,678.12
  4. Step 4: Simplify right side
    659,704.80x = 389,065,739,904.71
  5. Step 5: Solve for x
    x = 389,065,739,904.71/659,704.80
  6. Step 6: Final answer
    x = 589,757.33

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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.