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Finding the Fourth Proportional to 760.57, 1,049.63 and 465.75

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Solution

The fourth proportional to 760.57, 1,049.63 and 465.75 is: 642.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    760.57 : 1,049.63 = 465.75 : x
  2. Step 2: Convert to fraction form
    760.57/1,049.63 = 465.75/x
  3. Step 3: Cross multiply
    760.57x = 1,049.63 × 465.75
  4. Step 4: Simplify right side
    760.57x = 488,865.17
  5. Step 5: Solve for x
    x = 488,865.17/760.57
  6. Step 6: Final answer
    x = 642.76

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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.