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Finding the Fourth Proportional to 1,429.93, 2,145.75 and 814.51

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Solution

The fourth proportional to 1,429.93, 2,145.75 and 814.51 is: 1,222.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,429.93 : 2,145.75 = 814.51 : x
  2. Step 2: Convert to fraction form
    1,429.93/2,145.75 = 814.51/x
  3. Step 3: Cross multiply
    1,429.93x = 2,145.75 × 814.51
  4. Step 4: Simplify right side
    1,429.93x = 1,747,734.83
  5. Step 5: Solve for x
    x = 1,747,734.83/1,429.93
  6. Step 6: Final answer
    x = 1,222.25

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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.