Home / 2,089.17-2,881.98-1,390.68

Finding the Fourth Proportional to 2,089.17, 2,881.98 and 1,390.68

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Solution

The fourth proportional to 2,089.17, 2,881.98 and 1,390.68 is: 1,918.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,089.17 : 2,881.98 = 1,390.68 : x
  2. Step 2: Convert to fraction form
    2,089.17/2,881.98 = 1,390.68/x
  3. Step 3: Cross multiply
    2,089.17x = 2,881.98 × 1,390.68
  4. Step 4: Simplify right side
    2,089.17x = 4,007,911.95
  5. Step 5: Solve for x
    x = 4,007,911.95/2,089.17
  6. Step 6: Final answer
    x = 1,918.42

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1.5x scale

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.