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Finding the Fourth Proportional to 877.02, 1,315.50 and 260.73

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Solution

The fourth proportional to 877.02, 1,315.50 and 260.73 is: 391.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    877.02 : 1,315.50 = 260.73 : x
  2. Step 2: Convert to fraction form
    877.02/1,315.50 = 260.73/x
  3. Step 3: Cross multiply
    877.02x = 1,315.50 × 260.73
  4. Step 4: Simplify right side
    877.02x = 342,986.37
  5. Step 5: Solve for x
    x = 342,986.37/877.02
  6. Step 6: Final answer
    x = 391.08

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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.