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Finding the Fourth Proportional to 554.25, 765.55 and 449.71

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Solution

The fourth proportional to 554.25, 765.55 and 449.71 is: 621.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.25 : 765.55 = 449.71 : x
  2. Step 2: Convert to fraction form
    554.25/765.55 = 449.71/x
  3. Step 3: Cross multiply
    554.25x = 765.55 × 449.71
  4. Step 4: Simplify right side
    554.25x = 344,275.49
  5. Step 5: Solve for x
    x = 344,275.49/554.25
  6. Step 6: Final answer
    x = 621.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.