Home / 1,429.12-2,140.93-810.93

Finding the Fourth Proportional to 1,429.12, 2,140.93 and 810.93

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Solution

The fourth proportional to 1,429.12, 2,140.93 and 810.93 is: 1,214.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,429.12 : 2,140.93 = 810.93 : x
  2. Step 2: Convert to fraction form
    1,429.12/2,140.93 = 810.93/x
  3. Step 3: Cross multiply
    1,429.12x = 2,140.93 × 810.93
  4. Step 4: Simplify right side
    1,429.12x = 1,736,144.36
  5. Step 5: Solve for x
    x = 1,736,144.36/1,429.12
  6. Step 6: Final answer
    x = 1,214.83

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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.