Home / 1,948.31-2,688.86-1,320.14

Finding the Fourth Proportional to 1,948.31, 2,688.86 and 1,320.14

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Solution

The fourth proportional to 1,948.31, 2,688.86 and 1,320.14 is: 1,821.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,948.31 : 2,688.86 = 1,320.14 : x
  2. Step 2: Convert to fraction form
    1,948.31/2,688.86 = 1,320.14/x
  3. Step 3: Cross multiply
    1,948.31x = 2,688.86 × 1,320.14
  4. Step 4: Simplify right side
    1,948.31x = 3,549,680.62
  5. Step 5: Solve for x
    x = 3,549,680.62/1,948.31
  6. Step 6: Final answer
    x = 1,821.93

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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.