Home / 1,938.15-2,905.20-1,059.30

Finding the Fourth Proportional to 1,938.15, 2,905.20 and 1,059.30

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Solution

The fourth proportional to 1,938.15, 2,905.20 and 1,059.30 is: 1,587.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,938.15 : 2,905.20 = 1,059.30 : x
  2. Step 2: Convert to fraction form
    1,938.15/2,905.20 = 1,059.30/x
  3. Step 3: Cross multiply
    1,938.15x = 2,905.20 × 1,059.30
  4. Step 4: Simplify right side
    1,938.15x = 3,077,478.36
  5. Step 5: Solve for x
    x = 3,077,478.36/1,938.15
  6. Step 6: Final answer
    x = 1,587.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.