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Finding the Fourth Proportional to 659,672.70, 989,509.05 and 620,306.70

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Solution

The fourth proportional to 659,672.70, 989,509.05 and 620,306.70 is: 930,460.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,672.70 : 989,509.05 = 620,306.70 : x
  2. Step 2: Convert to fraction form
    659,672.70/989,509.05 = 620,306.70/x
  3. Step 3: Cross multiply
    659,672.70x = 989,509.05 × 620,306.70
  4. Step 4: Simplify right side
    659,672.70x = 613,799,093,425.64
  5. Step 5: Solve for x
    x = 613,799,093,425.64/659,672.70
  6. Step 6: Final answer
    x = 930,460.05

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Similar ratio
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1.5x scale

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.