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Finding the Fourth Proportional to 659,912.70, 989,869.05 and 585,117.30

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Solution

The fourth proportional to 659,912.70, 989,869.05 and 585,117.30 is: 877,675.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,912.70 : 989,869.05 = 585,117.30 : x
  2. Step 2: Convert to fraction form
    659,912.70/989,869.05 = 585,117.30/x
  3. Step 3: Cross multiply
    659,912.70x = 989,869.05 × 585,117.30
  4. Step 4: Simplify right side
    659,912.70x = 579,189,505,889.57
  5. Step 5: Solve for x
    x = 579,189,505,889.57/659,912.70
  6. Step 6: Final answer
    x = 877,675.95

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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.