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Finding the Fourth Proportional to 646,860.80, 970,291.20 and 642,713.60

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Solution

The fourth proportional to 646,860.80, 970,291.20 and 642,713.60 is: 964,070.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,860.80 : 970,291.20 = 642,713.60 : x
  2. Step 2: Convert to fraction form
    646,860.80/970,291.20 = 642,713.60/x
  3. Step 3: Cross multiply
    646,860.80x = 970,291.20 × 642,713.60
  4. Step 4: Simplify right side
    646,860.80x = 623,619,350,200.32
  5. Step 5: Solve for x
    x = 623,619,350,200.32/646,860.80
  6. Step 6: Final answer
    x = 964,070.40

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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.