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Finding the Fourth Proportional to 917.79, 1,374.53 and 735.41

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Solution

The fourth proportional to 917.79, 1,374.53 and 735.41 is: 1,101.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    917.79 : 1,374.53 = 735.41 : x
  2. Step 2: Convert to fraction form
    917.79/1,374.53 = 735.41/x
  3. Step 3: Cross multiply
    917.79x = 1,374.53 × 735.41
  4. Step 4: Simplify right side
    917.79x = 1,010,832.56
  5. Step 5: Solve for x
    x = 1,010,832.56/917.79
  6. Step 6: Final answer
    x = 1,101.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.