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Finding the Fourth Proportional to 917, 1,264.90 and 602.30

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Solution

The fourth proportional to 917, 1,264.90 and 602.30 is: 830.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    917 : 1,264.90 = 602.30 : x
  2. Step 2: Convert to fraction form
    917/1,264.90 = 602.30/x
  3. Step 3: Cross multiply
    917x = 1,264.90 × 602.30
  4. Step 4: Simplify right side
    917x = 761,849.27
  5. Step 5: Solve for x
    x = 761,849.27/917
  6. Step 6: Final answer
    x = 830.81

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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.