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Finding the Fourth Proportional to 563.70, 777.93 and 397.98

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Solution

The fourth proportional to 563.70, 777.93 and 397.98 is: 549.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.70 : 777.93 = 397.98 : x
  2. Step 2: Convert to fraction form
    563.70/777.93 = 397.98/x
  3. Step 3: Cross multiply
    563.70x = 777.93 × 397.98
  4. Step 4: Simplify right side
    563.70x = 309,600.58
  5. Step 5: Solve for x
    x = 309,600.58/563.70
  6. Step 6: Final answer
    x = 549.23

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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.