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Finding the Fourth Proportional to 916.08, 1,373.60 and 291.26

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Solution

The fourth proportional to 916.08, 1,373.60 and 291.26 is: 436.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    916.08 : 1,373.60 = 291.26 : x
  2. Step 2: Convert to fraction form
    916.08/1,373.60 = 291.26/x
  3. Step 3: Cross multiply
    916.08x = 1,373.60 × 291.26
  4. Step 4: Simplify right side
    916.08x = 400,074.74
  5. Step 5: Solve for x
    x = 400,074.74/916.08
  6. Step 6: Final answer
    x = 436.72

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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.