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Finding the Fourth Proportional to 986,565.83, 1,361,575.71 and 820,700.78

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Solution

The fourth proportional to 986,565.83, 1,361,575.71 and 820,700.78 is: 1,132,662.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    986,565.83 : 1,361,575.71 = 820,700.78 : x
  2. Step 2: Convert to fraction form
    986,565.83/1,361,575.71 = 820,700.78/x
  3. Step 3: Cross multiply
    986,565.83x = 1,361,575.71 × 820,700.78
  4. Step 4: Simplify right side
    986,565.83x = 1,117,446,240,418.18
  5. Step 5: Solve for x
    x = 1,117,446,240,418.18/986,565.83
  6. Step 6: Final answer
    x = 1,132,662.63

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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.