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Finding the Fourth Proportional to 841.53, 1,161.32 and 487.47

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Solution

The fourth proportional to 841.53, 1,161.32 and 487.47 is: 672.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    841.53 : 1,161.32 = 487.47 : x
  2. Step 2: Convert to fraction form
    841.53/1,161.32 = 487.47/x
  3. Step 3: Cross multiply
    841.53x = 1,161.32 × 487.47
  4. Step 4: Simplify right side
    841.53x = 566,103.51
  5. Step 5: Solve for x
    x = 566,103.51/841.53
  6. Step 6: Final answer
    x = 672.71

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1.5x scale

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.