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Finding the Fourth Proportional to 696,455.47, 1,044,978.45 and 380,543.32

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Solution

The fourth proportional to 696,455.47, 1,044,978.45 and 380,543.32 is: 570,976.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    696,455.47 : 1,044,978.45 = 380,543.32 : x
  2. Step 2: Convert to fraction form
    696,455.47/1,044,978.45 = 380,543.32/x
  3. Step 3: Cross multiply
    696,455.47x = 1,044,978.45 × 380,543.32
  4. Step 4: Simplify right side
    696,455.47x = 397,659,568,691.45
  5. Step 5: Solve for x
    x = 397,659,568,691.45/696,455.47
  6. Step 6: Final answer
    x = 570,976.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.