Home / 1,298.10-1,944.26-647.47

Finding the Fourth Proportional to 1,298.10, 1,944.26 and 647.47

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Solution

The fourth proportional to 1,298.10, 1,944.26 and 647.47 is: 969.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,298.10 : 1,944.26 = 647.47 : x
  2. Step 2: Convert to fraction form
    1,298.10/1,944.26 = 647.47/x
  3. Step 3: Cross multiply
    1,298.10x = 1,944.26 × 647.47
  4. Step 4: Simplify right side
    1,298.10x = 1,258,850.02
  5. Step 5: Solve for x
    x = 1,258,850.02/1,298.10
  6. Step 6: Final answer
    x = 969.76

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.