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Finding the Fourth Proportional to 1,566.58, 2,161.85 and 885.15

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Solution

The fourth proportional to 1,566.58, 2,161.85 and 885.15 is: 1,221.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,566.58 : 2,161.85 = 885.15 : x
  2. Step 2: Convert to fraction form
    1,566.58/2,161.85 = 885.15/x
  3. Step 3: Cross multiply
    1,566.58x = 2,161.85 × 885.15
  4. Step 4: Simplify right side
    1,566.58x = 1,913,563.80
  5. Step 5: Solve for x
    x = 1,913,563.80/1,566.58
  6. Step 6: Final answer
    x = 1,221.49

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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.