Home / 2,890.31-3,988.64-1,564.02

Finding the Fourth Proportional to 2,890.31, 3,988.64 and 1,564.02

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Solution

The fourth proportional to 2,890.31, 3,988.64 and 1,564.02 is: 2,158.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,890.31 : 3,988.64 = 1,564.02 : x
  2. Step 2: Convert to fraction form
    2,890.31/3,988.64 = 1,564.02/x
  3. Step 3: Cross multiply
    2,890.31x = 3,988.64 × 1,564.02
  4. Step 4: Simplify right side
    2,890.31x = 6,238,297.69
  5. Step 5: Solve for x
    x = 6,238,297.69/2,890.31
  6. Step 6: Final answer
    x = 2,158.35

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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.