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Finding the Fourth Proportional to 746.90, 1,030.63 and 415.22

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Solution

The fourth proportional to 746.90, 1,030.63 and 415.22 is: 572.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    746.90 : 1,030.63 = 415.22 : x
  2. Step 2: Convert to fraction form
    746.90/1,030.63 = 415.22/x
  3. Step 3: Cross multiply
    746.90x = 1,030.63 × 415.22
  4. Step 4: Simplify right side
    746.90x = 427,938.19
  5. Step 5: Solve for x
    x = 427,938.19/746.90
  6. Step 6: Final answer
    x = 572.95

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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.