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Finding the Fourth Proportional to 703,913.80, 971,388.38 and 397,984.90

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Solution

The fourth proportional to 703,913.80, 971,388.38 and 397,984.90 is: 549,212.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    703,913.80 : 971,388.38 = 397,984.90 : x
  2. Step 2: Convert to fraction form
    703,913.80/971,388.38 = 397,984.90/x
  3. Step 3: Cross multiply
    703,913.80x = 971,388.38 × 397,984.90
  4. Step 4: Simplify right side
    703,913.80x = 386,597,907,275.46
  5. Step 5: Solve for x
    x = 386,597,907,275.46/703,913.80
  6. Step 6: Final answer
    x = 549,212.00

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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.