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Finding the Fourth Proportional to 917.67, 1,266.36 and 519.32

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Solution

The fourth proportional to 917.67, 1,266.36 and 519.32 is: 716.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    917.67 : 1,266.36 = 519.32 : x
  2. Step 2: Convert to fraction form
    917.67/1,266.36 = 519.32/x
  3. Step 3: Cross multiply
    917.67x = 1,266.36 × 519.32
  4. Step 4: Simplify right side
    917.67x = 657,646.08
  5. Step 5: Solve for x
    x = 657,646.08/917.67
  6. Step 6: Final answer
    x = 716.65

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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.