Home / 1,405.07-1,937.49-1,081.13

Finding the Fourth Proportional to 1,405.07, 1,937.49 and 1,081.13

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Solution

The fourth proportional to 1,405.07, 1,937.49 and 1,081.13 is: 1,490.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,405.07 : 1,937.49 = 1,081.13 : x
  2. Step 2: Convert to fraction form
    1,405.07/1,937.49 = 1,081.13/x
  3. Step 3: Cross multiply
    1,405.07x = 1,937.49 × 1,081.13
  4. Step 4: Simplify right side
    1,405.07x = 2,094,668.88
  5. Step 5: Solve for x
    x = 2,094,668.88/1,405.07
  6. Step 6: Final answer
    x = 1,490.80

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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.