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Finding the Fourth Proportional to 841.83, 1,161.69 and 468.78

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Solution

The fourth proportional to 841.83, 1,161.69 and 468.78 is: 646.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    841.83 : 1,161.69 = 468.78 : x
  2. Step 2: Convert to fraction form
    841.83/1,161.69 = 468.78/x
  3. Step 3: Cross multiply
    841.83x = 1,161.69 × 468.78
  4. Step 4: Simplify right side
    841.83x = 544,577.04
  5. Step 5: Solve for x
    x = 544,577.04/841.83
  6. Step 6: Final answer
    x = 646.90

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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.