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Finding the Fourth Proportional to 917.31, 1,266.20 and 602.83

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Solution

The fourth proportional to 917.31, 1,266.20 and 602.83 is: 832.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    917.31 : 1,266.20 = 602.83 : x
  2. Step 2: Convert to fraction form
    917.31/1,266.20 = 602.83/x
  3. Step 3: Cross multiply
    917.31x = 1,266.20 × 602.83
  4. Step 4: Simplify right side
    917.31x = 763,303.35
  5. Step 5: Solve for x
    x = 763,303.35/917.31
  6. Step 6: Final answer
    x = 832.11

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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.