Home / 1,440.14-1,987.23-810.62

Finding the Fourth Proportional to 1,440.14, 1,987.23 and 810.62

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Solution

The fourth proportional to 1,440.14, 1,987.23 and 810.62 is: 1,118.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.14 : 1,987.23 = 810.62 : x
  2. Step 2: Convert to fraction form
    1,440.14/1,987.23 = 810.62/x
  3. Step 3: Cross multiply
    1,440.14x = 1,987.23 × 810.62
  4. Step 4: Simplify right side
    1,440.14x = 1,610,888.38
  5. Step 5: Solve for x
    x = 1,610,888.38/1,440.14
  6. Step 6: Final answer
    x = 1,118.56

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1.5x scale

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.