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Finding the Fourth Proportional to 703,921.80, 971,399.42 and 397,992.90

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Solution

The fourth proportional to 703,921.80, 971,399.42 and 397,992.90 is: 549,223.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    703,921.80 : 971,399.42 = 397,992.90 : x
  2. Step 2: Convert to fraction form
    703,921.80/971,399.42 = 397,992.90/x
  3. Step 3: Cross multiply
    703,921.80x = 971,399.42 × 397,992.90
  4. Step 4: Simplify right side
    703,921.80x = 386,610,072,224.12
  5. Step 5: Solve for x
    x = 386,610,072,224.12/703,921.80
  6. Step 6: Final answer
    x = 549,223.04

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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.