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Finding the Fourth Proportional to 659,128.20, 988,692.30 and 659,128.20

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Solution

The fourth proportional to 659,128.20, 988,692.30 and 659,128.20 is: 988,692.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,128.20 : 988,692.30 = 659,128.20 : x
  2. Step 2: Convert to fraction form
    659,128.20/988,692.30 = 659,128.20/x
  3. Step 3: Cross multiply
    659,128.20x = 988,692.30 × 659,128.20
  4. Step 4: Simplify right side
    659,128.20x = 651,674,976,052.86
  5. Step 5: Solve for x
    x = 651,674,976,052.86/659,128.20
  6. Step 6: Final answer
    x = 988,692.30

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Double scale
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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.