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Finding the Fourth Proportional to 3,228.60, 4,842.90 and 1,038.90

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Solution

The fourth proportional to 3,228.60, 4,842.90 and 1,038.90 is: 1,558.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,228.60 : 4,842.90 = 1,038.90 : x
  2. Step 2: Convert to fraction form
    3,228.60/4,842.90 = 1,038.90/x
  3. Step 3: Cross multiply
    3,228.60x = 4,842.90 × 1,038.90
  4. Step 4: Simplify right side
    3,228.60x = 5,031,288.81
  5. Step 5: Solve for x
    x = 5,031,288.81/3,228.60
  6. Step 6: Final answer
    x = 1,558.35

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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.