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Finding the Fourth Proportional to 841.19, 1,161.01 and 487.17

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Solution

The fourth proportional to 841.19, 1,161.01 and 487.17 is: 672.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    841.19 : 1,161.01 = 487.17 : x
  2. Step 2: Convert to fraction form
    841.19/1,161.01 = 487.17/x
  3. Step 3: Cross multiply
    841.19x = 1,161.01 × 487.17
  4. Step 4: Simplify right side
    841.19x = 565,609.24
  5. Step 5: Solve for x
    x = 565,609.24/841.19
  6. Step 6: Final answer
    x = 672.39

Related Problems

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Half scale
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Double scale
Find fourth proportional to 842.19, 1,162.39 and 488.17
Similar ratio
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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.