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Finding the Fourth Proportional to 659,912.20, 989,868.30 and 585,116.80

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Solution

The fourth proportional to 659,912.20, 989,868.30 and 585,116.80 is: 877,675.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,912.20 : 989,868.30 = 585,116.80 : x
  2. Step 2: Convert to fraction form
    659,912.20/989,868.30 = 585,116.80/x
  3. Step 3: Cross multiply
    659,912.20x = 989,868.30 × 585,116.80
  4. Step 4: Simplify right side
    659,912.20x = 579,188,572,117.44
  5. Step 5: Solve for x
    x = 579,188,572,117.44/659,912.20
  6. Step 6: Final answer
    x = 877,675.20

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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.