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Finding the Fourth Proportional to 760.46, 1,140.89 and 298.15

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Solution

The fourth proportional to 760.46, 1,140.89 and 298.15 is: 447.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    760.46 : 1,140.89 = 298.15 : x
  2. Step 2: Convert to fraction form
    760.46/1,140.89 = 298.15/x
  3. Step 3: Cross multiply
    760.46x = 1,140.89 × 298.15
  4. Step 4: Simplify right side
    760.46x = 340,152.01
  5. Step 5: Solve for x
    x = 340,152.01/760.46
  6. Step 6: Final answer
    x = 447.30

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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.