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Finding the Fourth Proportional to 916.97, 1,375.53 and 368.85

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Solution

The fourth proportional to 916.97, 1,375.53 and 368.85 is: 553.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    916.97 : 1,375.53 = 368.85 : x
  2. Step 2: Convert to fraction form
    916.97/1,375.53 = 368.85/x
  3. Step 3: Cross multiply
    916.97x = 1,375.53 × 368.85
  4. Step 4: Simplify right side
    916.97x = 507,364.24
  5. Step 5: Solve for x
    x = 507,364.24/916.97
  6. Step 6: Final answer
    x = 553.31

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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.