Home / 2,162.79-2,984.40-1,218.51

Finding the Fourth Proportional to 2,162.79, 2,984.40 and 1,218.51

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Solution

The fourth proportional to 2,162.79, 2,984.40 and 1,218.51 is: 1,681.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,162.79 : 2,984.40 = 1,218.51 : x
  2. Step 2: Convert to fraction form
    2,162.79/2,984.40 = 1,218.51/x
  3. Step 3: Cross multiply
    2,162.79x = 2,984.40 × 1,218.51
  4. Step 4: Simplify right side
    2,162.79x = 3,636,521.24
  5. Step 5: Solve for x
    x = 3,636,521.24/2,162.79
  6. Step 6: Final answer
    x = 1,681.40

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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.