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Finding the Fourth Proportional to 875,689.30, 1,310,974.89 and 791,642.89

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Solution

The fourth proportional to 875,689.30, 1,310,974.89 and 791,642.89 is: 1,185,150.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    875,689.30 : 1,310,974.89 = 791,642.89 : x
  2. Step 2: Convert to fraction form
    875,689.30/1,310,974.89 = 791,642.89/x
  3. Step 3: Cross multiply
    875,689.30x = 1,310,974.89 × 791,642.89
  4. Step 4: Simplify right side
    875,689.30x = 1,037,823,950,637.03
  5. Step 5: Solve for x
    x = 1,037,823,950,637.03/875,689.30
  6. Step 6: Final answer
    x = 1,185,150.89

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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.