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Finding the Fourth Proportional to 1,555.60, 2,146.76 and 847.46

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Solution

The fourth proportional to 1,555.60, 2,146.76 and 847.46 is: 1,169.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.60 : 2,146.76 = 847.46 : x
  2. Step 2: Convert to fraction form
    1,555.60/2,146.76 = 847.46/x
  3. Step 3: Cross multiply
    1,555.60x = 2,146.76 × 847.46
  4. Step 4: Simplify right side
    1,555.60x = 1,819,293.23
  5. Step 5: Solve for x
    x = 1,819,293.23/1,555.60
  6. Step 6: Final answer
    x = 1,169.51

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Double scale
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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.