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Finding the Fourth Proportional to 760.88, 1,140.63 and 273.81

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Solution

The fourth proportional to 760.88, 1,140.63 and 273.81 is: 410.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    760.88 : 1,140.63 = 273.81 : x
  2. Step 2: Convert to fraction form
    760.88/1,140.63 = 273.81/x
  3. Step 3: Cross multiply
    760.88x = 1,140.63 × 273.81
  4. Step 4: Simplify right side
    760.88x = 312,319.15
  5. Step 5: Solve for x
    x = 312,319.15/760.88
  6. Step 6: Final answer
    x = 410.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.