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Finding the Fourth Proportional to 917.87, 1,376.96 and 370.53

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Solution

The fourth proportional to 917.87, 1,376.96 and 370.53 is: 555.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    917.87 : 1,376.96 = 370.53 : x
  2. Step 2: Convert to fraction form
    917.87/1,376.96 = 370.53/x
  3. Step 3: Cross multiply
    917.87x = 1,376.96 × 370.53
  4. Step 4: Simplify right side
    917.87x = 510,203.14
  5. Step 5: Solve for x
    x = 510,203.14/917.87
  6. Step 6: Final answer
    x = 555.86

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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.