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Finding the Fourth Proportional to 563.07, 777.51 and 397.65

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Solution

The fourth proportional to 563.07, 777.51 and 397.65 is: 549.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.07 : 777.51 = 397.65 : x
  2. Step 2: Convert to fraction form
    563.07/777.51 = 397.65/x
  3. Step 3: Cross multiply
    563.07x = 777.51 × 397.65
  4. Step 4: Simplify right side
    563.07x = 309,176.85
  5. Step 5: Solve for x
    x = 309,176.85/563.07
  6. Step 6: Final answer
    x = 549.09

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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.