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Finding the Fourth Proportional to 916.80, 1,375.61 and 370.05

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Solution

The fourth proportional to 916.80, 1,375.61 and 370.05 is: 555.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    916.80 : 1,375.61 = 370.05 : x
  2. Step 2: Convert to fraction form
    916.80/1,375.61 = 370.05/x
  3. Step 3: Cross multiply
    916.80x = 1,375.61 × 370.05
  4. Step 4: Simplify right side
    916.80x = 509,042.63
  5. Step 5: Solve for x
    x = 509,042.63/916.80
  6. Step 6: Final answer
    x = 555.24

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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.