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Finding the Fourth Proportional to 659,422.20, 989,133.30 and 393,701.70

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Solution

The fourth proportional to 659,422.20, 989,133.30 and 393,701.70 is: 590,552.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,422.20 : 989,133.30 = 393,701.70 : x
  2. Step 2: Convert to fraction form
    659,422.20/989,133.30 = 393,701.70/x
  3. Step 3: Cross multiply
    659,422.20x = 989,133.30 × 393,701.70
  4. Step 4: Simplify right side
    659,422.20x = 389,423,461,736.61
  5. Step 5: Solve for x
    x = 389,423,461,736.61/659,422.20
  6. Step 6: Final answer
    x = 590,552.55

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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.