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Finding the Fourth Proportional to 917.24, 1,375.70 and 570.29

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Solution

The fourth proportional to 917.24, 1,375.70 and 570.29 is: 855.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    917.24 : 1,375.70 = 570.29 : x
  2. Step 2: Convert to fraction form
    917.24/1,375.70 = 570.29/x
  3. Step 3: Cross multiply
    917.24x = 1,375.70 × 570.29
  4. Step 4: Simplify right side
    917.24x = 784,538.22
  5. Step 5: Solve for x
    x = 784,538.22/917.24
  6. Step 6: Final answer
    x = 855.33

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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.