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Finding the Fourth Proportional to 917.61, 1,377.50 and 370.19

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Solution

The fourth proportional to 917.61, 1,377.50 and 370.19 is: 555.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    917.61 : 1,377.50 = 370.19 : x
  2. Step 2: Convert to fraction form
    917.61/1,377.50 = 370.19/x
  3. Step 3: Cross multiply
    917.61x = 1,377.50 × 370.19
  4. Step 4: Simplify right side
    917.61x = 509,927.99
  5. Step 5: Solve for x
    x = 509,927.99/917.61
  6. Step 6: Final answer
    x = 555.71

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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.