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Finding the Fourth Proportional to 917.11, 1,374.95 and 627.67

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Solution

The fourth proportional to 917.11, 1,374.95 and 627.67 is: 941.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    917.11 : 1,374.95 = 627.67 : x
  2. Step 2: Convert to fraction form
    917.11/1,374.95 = 627.67/x
  3. Step 3: Cross multiply
    917.11x = 1,374.95 × 627.67
  4. Step 4: Simplify right side
    917.11x = 863,017.52
  5. Step 5: Solve for x
    x = 863,017.52/917.11
  6. Step 6: Final answer
    x = 941.02

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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.