Home / 1,985.24-2,740.16-1,238.76

Finding the Fourth Proportional to 1,985.24, 2,740.16 and 1,238.76

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Solution

The fourth proportional to 1,985.24, 2,740.16 and 1,238.76 is: 1,709.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.24 : 2,740.16 = 1,238.76 : x
  2. Step 2: Convert to fraction form
    1,985.24/2,740.16 = 1,238.76/x
  3. Step 3: Cross multiply
    1,985.24x = 2,740.16 × 1,238.76
  4. Step 4: Simplify right side
    1,985.24x = 3,394,403.70
  5. Step 5: Solve for x
    x = 3,394,403.70/1,985.24
  6. Step 6: Final answer
    x = 1,709.82

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Half scale
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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.