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Finding the Fourth Proportional to 746.96, 1,030.88 and 415.40

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Solution

The fourth proportional to 746.96, 1,030.88 and 415.40 is: 573.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    746.96 : 1,030.88 = 415.40 : x
  2. Step 2: Convert to fraction form
    746.96/1,030.88 = 415.40/x
  3. Step 3: Cross multiply
    746.96x = 1,030.88 × 415.40
  4. Step 4: Simplify right side
    746.96x = 428,225.48
  5. Step 5: Solve for x
    x = 428,225.48/746.96
  6. Step 6: Final answer
    x = 573.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.