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Finding the Fourth Proportional to 647,087.20, 970,630.80 and 605,615.20

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Solution

The fourth proportional to 647,087.20, 970,630.80 and 605,615.20 is: 908,422.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,087.20 : 970,630.80 = 605,615.20 : x
  2. Step 2: Convert to fraction form
    647,087.20/970,630.80 = 605,615.20/x
  3. Step 3: Cross multiply
    647,087.20x = 970,630.80 × 605,615.20
  4. Step 4: Simplify right side
    647,087.20x = 587,828,766,068.16
  5. Step 5: Solve for x
    x = 587,828,766,068.16/647,087.20
  6. Step 6: Final answer
    x = 908,422.80

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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.