Home / 2,890.37-3,988.71-1,564.08

Finding the Fourth Proportional to 2,890.37, 3,988.71 and 1,564.08

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Solution

The fourth proportional to 2,890.37, 3,988.71 and 1,564.08 is: 2,158.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,890.37 : 3,988.71 = 1,564.08 : x
  2. Step 2: Convert to fraction form
    2,890.37/3,988.71 = 1,564.08/x
  3. Step 3: Cross multiply
    2,890.37x = 3,988.71 × 1,564.08
  4. Step 4: Simplify right side
    2,890.37x = 6,238,645.67
  5. Step 5: Solve for x
    x = 6,238,645.67/2,890.37
  6. Step 6: Final answer
    x = 2,158.42

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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.