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Finding the Fourth Proportional to 911.54, 1,368.53 and 424.94

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Solution

The fourth proportional to 911.54, 1,368.53 and 424.94 is: 637.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    911.54 : 1,368.53 = 424.94 : x
  2. Step 2: Convert to fraction form
    911.54/1,368.53 = 424.94/x
  3. Step 3: Cross multiply
    911.54x = 1,368.53 × 424.94
  4. Step 4: Simplify right side
    911.54x = 581,534.17
  5. Step 5: Solve for x
    x = 581,534.17/911.54
  6. Step 6: Final answer
    x = 637.97

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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.