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Finding the Fourth Proportional to 659,672.20, 989,508.30 and 620,306.20

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Solution

The fourth proportional to 659,672.20, 989,508.30 and 620,306.20 is: 930,459.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,672.20 : 989,508.30 = 620,306.20 : x
  2. Step 2: Convert to fraction form
    659,672.20/989,508.30 = 620,306.20/x
  3. Step 3: Cross multiply
    659,672.20x = 989,508.30 × 620,306.20
  4. Step 4: Simplify right side
    659,672.20x = 613,798,133,441.46
  5. Step 5: Solve for x
    x = 613,798,133,441.46/659,672.20
  6. Step 6: Final answer
    x = 930,459.30

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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.