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Finding the Fourth Proportional to 760.32, 1,049.60 and 484.48

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Solution

The fourth proportional to 760.32, 1,049.60 and 484.48 is: 668.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    760.32 : 1,049.60 = 484.48 : x
  2. Step 2: Convert to fraction form
    760.32/1,049.60 = 484.48/x
  3. Step 3: Cross multiply
    760.32x = 1,049.60 × 484.48
  4. Step 4: Simplify right side
    760.32x = 508,510.21
  5. Step 5: Solve for x
    x = 508,510.21/760.32
  6. Step 6: Final answer
    x = 668.81

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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.