Home / 2,145.61-3,220.23-847.99

Finding the Fourth Proportional to 2,145.61, 3,220.23 and 847.99

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Solution

The fourth proportional to 2,145.61, 3,220.23 and 847.99 is: 1,272.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,145.61 : 3,220.23 = 847.99 : x
  2. Step 2: Convert to fraction form
    2,145.61/3,220.23 = 847.99/x
  3. Step 3: Cross multiply
    2,145.61x = 3,220.23 × 847.99
  4. Step 4: Simplify right side
    2,145.61x = 2,730,706.74
  5. Step 5: Solve for x
    x = 2,730,706.74/2,145.61
  6. Step 6: Final answer
    x = 1,272.70

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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.