Home / 1,711.51-2,564.70-1,320.92

Finding the Fourth Proportional to 1,711.51, 2,564.70 and 1,320.92

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Solution

The fourth proportional to 1,711.51, 2,564.70 and 1,320.92 is: 1,979.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,711.51 : 2,564.70 = 1,320.92 : x
  2. Step 2: Convert to fraction form
    1,711.51/2,564.70 = 1,320.92/x
  3. Step 3: Cross multiply
    1,711.51x = 2,564.70 × 1,320.92
  4. Step 4: Simplify right side
    1,711.51x = 3,387,769.79
  5. Step 5: Solve for x
    x = 3,387,769.79/1,711.51
  6. Step 6: Final answer
    x = 1,979.40

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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.