Home / 1,917.07-2,870.98-1,298.90

Finding the Fourth Proportional to 1,917.07, 2,870.98 and 1,298.90

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Solution

The fourth proportional to 1,917.07, 2,870.98 and 1,298.90 is: 1,945.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917.07 : 2,870.98 = 1,298.90 : x
  2. Step 2: Convert to fraction form
    1,917.07/2,870.98 = 1,298.90/x
  3. Step 3: Cross multiply
    1,917.07x = 2,870.98 × 1,298.90
  4. Step 4: Simplify right side
    1,917.07x = 3,729,108.53
  5. Step 5: Solve for x
    x = 3,729,108.53/1,917.07
  6. Step 6: Final answer
    x = 1,945.22

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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.