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Finding the Fourth Proportional to 917.94, 1,266.81 and 524.97

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Solution

The fourth proportional to 917.94, 1,266.81 and 524.97 is: 724.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    917.94 : 1,266.81 = 524.97 : x
  2. Step 2: Convert to fraction form
    917.94/1,266.81 = 524.97/x
  3. Step 3: Cross multiply
    917.94x = 1,266.81 × 524.97
  4. Step 4: Simplify right side
    917.94x = 665,037.25
  5. Step 5: Solve for x
    x = 665,037.25/917.94
  6. Step 6: Final answer
    x = 724.49

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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.