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Finding the Fourth Proportional to 901.92, 1,353.33 and 415.31

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Solution

The fourth proportional to 901.92, 1,353.33 and 415.31 is: 623.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.92 : 1,353.33 = 415.31 : x
  2. Step 2: Convert to fraction form
    901.92/1,353.33 = 415.31/x
  3. Step 3: Cross multiply
    901.92x = 1,353.33 × 415.31
  4. Step 4: Simplify right side
    901.92x = 562,044.72
  5. Step 5: Solve for x
    x = 562,044.72/901.92
  6. Step 6: Final answer
    x = 623.16

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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.