Home / 1,298.61-1,938.66-1,253.04

Finding the Fourth Proportional to 1,298.61, 1,938.66 and 1,253.04

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Solution

The fourth proportional to 1,298.61, 1,938.66 and 1,253.04 is: 1,870.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,298.61 : 1,938.66 = 1,253.04 : x
  2. Step 2: Convert to fraction form
    1,298.61/1,938.66 = 1,253.04/x
  3. Step 3: Cross multiply
    1,298.61x = 1,938.66 × 1,253.04
  4. Step 4: Simplify right side
    1,298.61x = 2,429,218.53
  5. Step 5: Solve for x
    x = 2,429,218.53/1,298.61
  6. Step 6: Final answer
    x = 1,870.63

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.