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Finding the Fourth Proportional to 877.25, 1,315.88 and 300.13

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Solution

The fourth proportional to 877.25, 1,315.88 and 300.13 is: 450.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    877.25 : 1,315.88 = 300.13 : x
  2. Step 2: Convert to fraction form
    877.25/1,315.88 = 300.13/x
  3. Step 3: Cross multiply
    877.25x = 1,315.88 × 300.13
  4. Step 4: Simplify right side
    877.25x = 394,935.06
  5. Step 5: Solve for x
    x = 394,935.06/877.25
  6. Step 6: Final answer
    x = 450.20

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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.