Home / 1,507.18-2,078.76-1,297.70

Finding the Fourth Proportional to 1,507.18, 2,078.76 and 1,297.70

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Solution

The fourth proportional to 1,507.18, 2,078.76 and 1,297.70 is: 1,789.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,507.18 : 2,078.76 = 1,297.70 : x
  2. Step 2: Convert to fraction form
    1,507.18/2,078.76 = 1,297.70/x
  3. Step 3: Cross multiply
    1,507.18x = 2,078.76 × 1,297.70
  4. Step 4: Simplify right side
    1,507.18x = 2,697,606.85
  5. Step 5: Solve for x
    x = 2,697,606.85/1,507.18
  6. Step 6: Final answer
    x = 1,789.84

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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.