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Finding the Fourth Proportional to 2,136.95, 3,205.85 and 904.35

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Solution

The fourth proportional to 2,136.95, 3,205.85 and 904.35 is: 1,356.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,136.95 : 3,205.85 = 904.35 : x
  2. Step 2: Convert to fraction form
    2,136.95/3,205.85 = 904.35/x
  3. Step 3: Cross multiply
    2,136.95x = 3,205.85 × 904.35
  4. Step 4: Simplify right side
    2,136.95x = 2,899,210.45
  5. Step 5: Solve for x
    x = 2,899,210.45/2,136.95
  6. Step 6: Final answer
    x = 1,356.70

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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.