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Finding the Fourth Proportional to 3,483.40, 5,223.21 and 2,389

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Solution

The fourth proportional to 3,483.40, 5,223.21 and 2,389 is: 3,582.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,483.40 : 5,223.21 = 2,389 : x
  2. Step 2: Convert to fraction form
    3,483.40/5,223.21 = 2,389/x
  3. Step 3: Cross multiply
    3,483.40x = 5,223.21 × 2,389
  4. Step 4: Simplify right side
    3,483.40x = 12,478,248.69
  5. Step 5: Solve for x
    x = 12,478,248.69/3,483.40
  6. Step 6: Final answer
    x = 3,582.20

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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.