Home / 1,421.56-2,139.88-1,013.52

Finding the Fourth Proportional to 1,421.56, 2,139.88 and 1,013.52

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Solution

The fourth proportional to 1,421.56, 2,139.88 and 1,013.52 is: 1,525.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.56 : 2,139.88 = 1,013.52 : x
  2. Step 2: Convert to fraction form
    1,421.56/2,139.88 = 1,013.52/x
  3. Step 3: Cross multiply
    1,421.56x = 2,139.88 × 1,013.52
  4. Step 4: Simplify right side
    1,421.56x = 2,168,811.18
  5. Step 5: Solve for x
    x = 2,168,811.18/1,421.56
  6. Step 6: Final answer
    x = 1,525.66

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.