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Finding the Fourth Proportional to 743.17, 1,025.57 and 448.38

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Solution

The fourth proportional to 743.17, 1,025.57 and 448.38 is: 618.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.17 : 1,025.57 = 448.38 : x
  2. Step 2: Convert to fraction form
    743.17/1,025.57 = 448.38/x
  3. Step 3: Cross multiply
    743.17x = 1,025.57 × 448.38
  4. Step 4: Simplify right side
    743.17x = 459,837.71
  5. Step 5: Solve for x
    x = 459,837.71/743.17
  6. Step 6: Final answer
    x = 618.76

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1.5x scale

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.