Home / 1,538.80-2,125.04-1,316.45

Finding the Fourth Proportional to 1,538.80, 2,125.04 and 1,316.45

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Solution

The fourth proportional to 1,538.80, 2,125.04 and 1,316.45 is: 1,817.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,538.80 : 2,125.04 = 1,316.45 : x
  2. Step 2: Convert to fraction form
    1,538.80/2,125.04 = 1,316.45/x
  3. Step 3: Cross multiply
    1,538.80x = 2,125.04 × 1,316.45
  4. Step 4: Simplify right side
    1,538.80x = 2,797,507.64
  5. Step 5: Solve for x
    x = 2,797,507.64/1,538.80
  6. Step 6: Final answer
    x = 1,817.98

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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.