Home / 1,575.39-2,172.70-1,340.09

Finding the Fourth Proportional to 1,575.39, 2,172.70 and 1,340.09

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Solution

The fourth proportional to 1,575.39, 2,172.70 and 1,340.09 is: 1,848.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,575.39 : 2,172.70 = 1,340.09 : x
  2. Step 2: Convert to fraction form
    1,575.39/2,172.70 = 1,340.09/x
  3. Step 3: Cross multiply
    1,575.39x = 2,172.70 × 1,340.09
  4. Step 4: Simplify right side
    1,575.39x = 2,911,613.54
  5. Step 5: Solve for x
    x = 2,911,613.54/1,575.39
  6. Step 6: Final answer
    x = 1,848.19

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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.