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Finding the Fourth Proportional to 2,038.70, 3,059.20 and 868.57

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Solution

The fourth proportional to 2,038.70, 3,059.20 and 868.57 is: 1,303.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,038.70 : 3,059.20 = 868.57 : x
  2. Step 2: Convert to fraction form
    2,038.70/3,059.20 = 868.57/x
  3. Step 3: Cross multiply
    2,038.70x = 3,059.20 × 868.57
  4. Step 4: Simplify right side
    2,038.70x = 2,657,139.41
  5. Step 5: Solve for x
    x = 2,657,139.41/2,038.70
  6. Step 6: Final answer
    x = 1,303.35

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1.5x scale

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.