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Finding the Fourth Proportional to 743.16, 1,025.93 and 623.49

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Solution

The fourth proportional to 743.16, 1,025.93 and 623.49 is: 860.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.16 : 1,025.93 = 623.49 : x
  2. Step 2: Convert to fraction form
    743.16/1,025.93 = 623.49/x
  3. Step 3: Cross multiply
    743.16x = 1,025.93 × 623.49
  4. Step 4: Simplify right side
    743.16x = 639,657.10
  5. Step 5: Solve for x
    x = 639,657.10/743.16
  6. Step 6: Final answer
    x = 860.73

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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.