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Finding the Fourth Proportional to 2,219.40, 3,328.99 and 902.77

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Solution

The fourth proportional to 2,219.40, 3,328.99 and 902.77 is: 1,354.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,219.40 : 3,328.99 = 902.77 : x
  2. Step 2: Convert to fraction form
    2,219.40/3,328.99 = 902.77/x
  3. Step 3: Cross multiply
    2,219.40x = 3,328.99 × 902.77
  4. Step 4: Simplify right side
    2,219.40x = 3,005,312.30
  5. Step 5: Solve for x
    x = 3,005,312.30/2,219.40
  6. Step 6: Final answer
    x = 1,354.11

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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.