Home / 1,575.12-2,172.36-1,421.52

Finding the Fourth Proportional to 1,575.12, 2,172.36 and 1,421.52

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Solution

The fourth proportional to 1,575.12, 2,172.36 and 1,421.52 is: 1,960.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,575.12 : 2,172.36 = 1,421.52 : x
  2. Step 2: Convert to fraction form
    1,575.12/2,172.36 = 1,421.52/x
  3. Step 3: Cross multiply
    1,575.12x = 2,172.36 × 1,421.52
  4. Step 4: Simplify right side
    1,575.12x = 3,088,053.19
  5. Step 5: Solve for x
    x = 3,088,053.19/1,575.12
  6. Step 6: Final answer
    x = 1,960.52

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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.