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Finding the Fourth Proportional to 760.26, 1,140.68 and 298.08

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Solution

The fourth proportional to 760.26, 1,140.68 and 298.08 is: 447.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    760.26 : 1,140.68 = 298.08 : x
  2. Step 2: Convert to fraction form
    760.26/1,140.68 = 298.08/x
  3. Step 3: Cross multiply
    760.26x = 1,140.68 × 298.08
  4. Step 4: Simplify right side
    760.26x = 340,013.89
  5. Step 5: Solve for x
    x = 340,013.89/760.26
  6. Step 6: Final answer
    x = 447.23

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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.