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Finding the Fourth Proportional to 743.55, 1,025.84 and 448.71

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Solution

The fourth proportional to 743.55, 1,025.84 and 448.71 is: 619.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.55 : 1,025.84 = 448.71 : x
  2. Step 2: Convert to fraction form
    743.55/1,025.84 = 448.71/x
  3. Step 3: Cross multiply
    743.55x = 1,025.84 × 448.71
  4. Step 4: Simplify right side
    743.55x = 460,307.11
  5. Step 5: Solve for x
    x = 460,307.11/743.55
  6. Step 6: Final answer
    x = 619.06

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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.