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Finding the Fourth Proportional to 703,909.31, 971,382.17 and 397,980.41

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Solution

The fourth proportional to 703,909.31, 971,382.17 and 397,980.41 is: 549,205.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    703,909.31 : 971,382.17 = 397,980.41 : x
  2. Step 2: Convert to fraction form
    703,909.31/971,382.17 = 397,980.41/x
  3. Step 3: Cross multiply
    703,909.31x = 971,382.17 × 397,980.41
  4. Step 4: Simplify right side
    703,909.31x = 386,591,070,421.33
  5. Step 5: Solve for x
    x = 386,591,070,421.33/703,909.31
  6. Step 6: Final answer
    x = 549,205.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.