Home / 1,510.20-2,261.70-859.68

Finding the Fourth Proportional to 1,510.20, 2,261.70 and 859.68

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Solution

The fourth proportional to 1,510.20, 2,261.70 and 859.68 is: 1,287.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,510.20 : 2,261.70 = 859.68 : x
  2. Step 2: Convert to fraction form
    1,510.20/2,261.70 = 859.68/x
  3. Step 3: Cross multiply
    1,510.20x = 2,261.70 × 859.68
  4. Step 4: Simplify right side
    1,510.20x = 1,944,338.26
  5. Step 5: Solve for x
    x = 1,944,338.26/1,510.20
  6. Step 6: Final answer
    x = 1,287.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.