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Finding the Fourth Proportional to 2,989.91, 4,483.25 and 909.02

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Solution

The fourth proportional to 2,989.91, 4,483.25 and 909.02 is: 1,363.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,989.91 : 4,483.25 = 909.02 : x
  2. Step 2: Convert to fraction form
    2,989.91/4,483.25 = 909.02/x
  3. Step 3: Cross multiply
    2,989.91x = 4,483.25 × 909.02
  4. Step 4: Simplify right side
    2,989.91x = 4,075,373.99
  5. Step 5: Solve for x
    x = 4,075,373.99/2,989.91
  6. Step 6: Final answer
    x = 1,363.04

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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.