Home / 1,538.91-2,318.75-1,271.00

Finding the Fourth Proportional to 1,538.91, 2,318.75 and 1,271.00

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Solution

The fourth proportional to 1,538.91, 2,318.75 and 1,271.00 is: 1,915.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,538.91 : 2,318.75 = 1,271.00 : x
  2. Step 2: Convert to fraction form
    1,538.91/2,318.75 = 1,271.00/x
  3. Step 3: Cross multiply
    1,538.91x = 2,318.75 × 1,271.00
  4. Step 4: Simplify right side
    1,538.91x = 2,947,140.22
  5. Step 5: Solve for x
    x = 2,947,140.22/1,538.91
  6. Step 6: Final answer
    x = 1,915.08

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.