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Finding the Fourth Proportional to 1,917.54, 2,645.53 and 1,254.76

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Solution

The fourth proportional to 1,917.54, 2,645.53 and 1,254.76 is: 1,731.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917.54 : 2,645.53 = 1,254.76 : x
  2. Step 2: Convert to fraction form
    1,917.54/2,645.53 = 1,254.76/x
  3. Step 3: Cross multiply
    1,917.54x = 2,645.53 × 1,254.76
  4. Step 4: Simplify right side
    1,917.54x = 3,319,495.47
  5. Step 5: Solve for x
    x = 3,319,495.47/1,917.54
  6. Step 6: Final answer
    x = 1,731.12

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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.