Home / 1,488.79-2,054.58-1,115.11

Finding the Fourth Proportional to 1,488.79, 2,054.58 and 1,115.11

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Solution

The fourth proportional to 1,488.79, 2,054.58 and 1,115.11 is: 1,538.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,488.79 : 2,054.58 = 1,115.11 : x
  2. Step 2: Convert to fraction form
    1,488.79/2,054.58 = 1,115.11/x
  3. Step 3: Cross multiply
    1,488.79x = 2,054.58 × 1,115.11
  4. Step 4: Simplify right side
    1,488.79x = 2,291,072.43
  5. Step 5: Solve for x
    x = 2,291,072.43/1,488.79
  6. Step 6: Final answer
    x = 1,538.89

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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.