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Finding the Fourth Proportional to 2,458.80, 3,688.29 and 815.49

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Solution

The fourth proportional to 2,458.80, 3,688.29 and 815.49 is: 1,223.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,458.80 : 3,688.29 = 815.49 : x
  2. Step 2: Convert to fraction form
    2,458.80/3,688.29 = 815.49/x
  3. Step 3: Cross multiply
    2,458.80x = 3,688.29 × 815.49
  4. Step 4: Simplify right side
    2,458.80x = 3,007,763.61
  5. Step 5: Solve for x
    x = 3,007,763.61/2,458.80
  6. Step 6: Final answer
    x = 1,223.26

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1.5x scale

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.