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Finding the Fourth Proportional to 875.13, 1,310.67 and 549.51

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Solution

The fourth proportional to 875.13, 1,310.67 and 549.51 is: 822.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    875.13 : 1,310.67 = 549.51 : x
  2. Step 2: Convert to fraction form
    875.13/1,310.67 = 549.51/x
  3. Step 3: Cross multiply
    875.13x = 1,310.67 × 549.51
  4. Step 4: Simplify right side
    875.13x = 720,226.27
  5. Step 5: Solve for x
    x = 720,226.27/875.13
  6. Step 6: Final answer
    x = 822.99

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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.