Home / 1,440.12-1,987.61-810.93

Finding the Fourth Proportional to 1,440.12, 1,987.61 and 810.93

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Solution

The fourth proportional to 1,440.12, 1,987.61 and 810.93 is: 1,119.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.12 : 1,987.61 = 810.93 : x
  2. Step 2: Convert to fraction form
    1,440.12/1,987.61 = 810.93/x
  3. Step 3: Cross multiply
    1,440.12x = 1,987.61 × 810.93
  4. Step 4: Simplify right side
    1,440.12x = 1,611,812.58
  5. Step 5: Solve for x
    x = 1,611,812.58/1,440.12
  6. Step 6: Final answer
    x = 1,119.22

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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.