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Finding the Fourth Proportional to 916.61, 1,374.90 and 223.29

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Solution

The fourth proportional to 916.61, 1,374.90 and 223.29 is: 334.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    916.61 : 1,374.90 = 223.29 : x
  2. Step 2: Convert to fraction form
    916.61/1,374.90 = 223.29/x
  3. Step 3: Cross multiply
    916.61x = 1,374.90 × 223.29
  4. Step 4: Simplify right side
    916.61x = 307,001.42
  5. Step 5: Solve for x
    x = 307,001.42/916.61
  6. Step 6: Final answer
    x = 334.93

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Double scale
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1.5x scale

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.