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Finding the Fourth Proportional to 563.17, 778.65 and 554.89

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Solution

The fourth proportional to 563.17, 778.65 and 554.89 is: 767.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.17 : 778.65 = 554.89 : x
  2. Step 2: Convert to fraction form
    563.17/778.65 = 554.89/x
  3. Step 3: Cross multiply
    563.17x = 778.65 × 554.89
  4. Step 4: Simplify right side
    563.17x = 432,065.10
  5. Step 5: Solve for x
    x = 432,065.10/563.17
  6. Step 6: Final answer
    x = 767.20

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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.