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Finding the Fourth Proportional to 659,615.40, 989,423.10 and 580,818.60

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Solution

The fourth proportional to 659,615.40, 989,423.10 and 580,818.60 is: 871,227.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,615.40 : 989,423.10 = 580,818.60 : x
  2. Step 2: Convert to fraction form
    659,615.40/989,423.10 = 580,818.60/x
  3. Step 3: Cross multiply
    659,615.40x = 989,423.10 × 580,818.60
  4. Step 4: Simplify right side
    659,615.40x = 574,675,339,749.66
  5. Step 5: Solve for x
    x = 574,675,339,749.66/659,615.40
  6. Step 6: Final answer
    x = 871,227.90

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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.