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Finding the Fourth Proportional to 917.56, 1,373.96 and 570.38

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Solution

The fourth proportional to 917.56, 1,373.96 and 570.38 is: 854.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    917.56 : 1,373.96 = 570.38 : x
  2. Step 2: Convert to fraction form
    917.56/1,373.96 = 570.38/x
  3. Step 3: Cross multiply
    917.56x = 1,373.96 × 570.38
  4. Step 4: Simplify right side
    917.56x = 783,673.86
  5. Step 5: Solve for x
    x = 783,673.86/917.56
  6. Step 6: Final answer
    x = 854.08

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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.