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Finding the Fourth Proportional to 887,871.86, 1,225,267.90 and 485,463.86

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Solution

The fourth proportional to 887,871.86, 1,225,267.90 and 485,463.86 is: 669,942.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    887,871.86 : 1,225,267.90 = 485,463.86 : x
  2. Step 2: Convert to fraction form
    887,871.86/1,225,267.90 = 485,463.86/x
  3. Step 3: Cross multiply
    887,871.86x = 1,225,267.90 × 485,463.86
  4. Step 4: Simplify right side
    887,871.86x = 594,823,284,268.09
  5. Step 5: Solve for x
    x = 594,823,284,268.09/887,871.86
  6. Step 6: Final answer
    x = 669,942.71

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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.