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Finding the Fourth Proportional to 916.25, 1,375.58 and 477.83

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Solution

The fourth proportional to 916.25, 1,375.58 and 477.83 is: 717.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    916.25 : 1,375.58 = 477.83 : x
  2. Step 2: Convert to fraction form
    916.25/1,375.58 = 477.83/x
  3. Step 3: Cross multiply
    916.25x = 1,375.58 × 477.83
  4. Step 4: Simplify right side
    916.25x = 657,298.02
  5. Step 5: Solve for x
    x = 657,298.02/916.25
  6. Step 6: Final answer
    x = 717.38

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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.