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Finding the Fourth Proportional to 703,911.81, 971,385.61 and 397,982.91

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Solution

The fourth proportional to 703,911.81, 971,385.61 and 397,982.91 is: 549,209.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    703,911.81 : 971,385.61 = 397,982.91 : x
  2. Step 2: Convert to fraction form
    703,911.81/971,385.61 = 397,982.91/x
  3. Step 3: Cross multiply
    703,911.81x = 971,385.61 × 397,982.91
  4. Step 4: Simplify right side
    703,911.81x = 386,594,871,799.93
  5. Step 5: Solve for x
    x = 386,594,871,799.93/703,911.81
  6. Step 6: Final answer
    x = 549,209.24

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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.