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Finding the Fourth Proportional to 917.70, 1,266.14 and 563.25

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Solution

The fourth proportional to 917.70, 1,266.14 and 563.25 is: 777.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    917.70 : 1,266.14 = 563.25 : x
  2. Step 2: Convert to fraction form
    917.70/1,266.14 = 563.25/x
  3. Step 3: Cross multiply
    917.70x = 1,266.14 × 563.25
  4. Step 4: Simplify right side
    917.70x = 713,153.36
  5. Step 5: Solve for x
    x = 713,153.36/917.70
  6. Step 6: Final answer
    x = 777.11

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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.