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Finding the Fourth Proportional to 712,103.16, 982,713.18 and 389,843.25

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Solution

The fourth proportional to 712,103.16, 982,713.18 and 389,843.25 is: 537,989.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,103.16 : 982,713.18 = 389,843.25 : x
  2. Step 2: Convert to fraction form
    712,103.16/982,713.18 = 389,843.25/x
  3. Step 3: Cross multiply
    712,103.16x = 982,713.18 × 389,843.25
  4. Step 4: Simplify right side
    712,103.16x = 383,104,099,909.04
  5. Step 5: Solve for x
    x = 383,104,099,909.04/712,103.16
  6. Step 6: Final answer
    x = 537,989.61

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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.