Home / 1,575.12-2,172.52-1,225.04

Finding the Fourth Proportional to 1,575.12, 2,172.52 and 1,225.04

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Solution

The fourth proportional to 1,575.12, 2,172.52 and 1,225.04 is: 1,689.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,575.12 : 2,172.52 = 1,225.04 : x
  2. Step 2: Convert to fraction form
    1,575.12/2,172.52 = 1,225.04/x
  3. Step 3: Cross multiply
    1,575.12x = 2,172.52 × 1,225.04
  4. Step 4: Simplify right side
    1,575.12x = 2,661,423.90
  5. Step 5: Solve for x
    x = 2,661,423.90/1,575.12
  6. Step 6: Final answer
    x = 1,689.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.