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Finding the Fourth Proportional to 703,945.95, 971,385.60 and 397,979.90

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Solution

The fourth proportional to 703,945.95, 971,385.60 and 397,979.90 is: 549,178.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    703,945.95 : 971,385.60 = 397,979.90 : x
  2. Step 2: Convert to fraction form
    703,945.95/971,385.60 = 397,979.90/x
  3. Step 3: Cross multiply
    703,945.95x = 971,385.60 × 397,979.90
  4. Step 4: Simplify right side
    703,945.95x = 386,591,939,092.51
  5. Step 5: Solve for x
    x = 386,591,939,092.51/703,945.95
  6. Step 6: Final answer
    x = 549,178.44

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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.