Home / 2,890.50-3,988.89-1,648.74

Finding the Fourth Proportional to 2,890.50, 3,988.89 and 1,648.74

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Solution

The fourth proportional to 2,890.50, 3,988.89 and 1,648.74 is: 2,275.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,890.50 : 3,988.89 = 1,648.74 : x
  2. Step 2: Convert to fraction form
    2,890.50/3,988.89 = 1,648.74/x
  3. Step 3: Cross multiply
    2,890.50x = 3,988.89 × 1,648.74
  4. Step 4: Simplify right side
    2,890.50x = 6,576,642.50
  5. Step 5: Solve for x
    x = 6,576,642.50/2,890.50
  6. Step 6: Final answer
    x = 2,275.26

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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.