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Finding the Fourth Proportional to 917.24, 1,375.90 and 340.12

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Solution

The fourth proportional to 917.24, 1,375.90 and 340.12 is: 510.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    917.24 : 1,375.90 = 340.12 : x
  2. Step 2: Convert to fraction form
    917.24/1,375.90 = 340.12/x
  3. Step 3: Cross multiply
    917.24x = 1,375.90 × 340.12
  4. Step 4: Simplify right side
    917.24x = 467,971.11
  5. Step 5: Solve for x
    x = 467,971.11/917.24
  6. Step 6: Final answer
    x = 510.19

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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.