Home / 1,287.24-1,927.60-1,030.20

Finding the Fourth Proportional to 1,287.24, 1,927.60 and 1,030.20

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Solution

The fourth proportional to 1,287.24, 1,927.60 and 1,030.20 is: 1,542.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287.24 : 1,927.60 = 1,030.20 : x
  2. Step 2: Convert to fraction form
    1,287.24/1,927.60 = 1,030.20/x
  3. Step 3: Cross multiply
    1,287.24x = 1,927.60 × 1,030.20
  4. Step 4: Simplify right side
    1,287.24x = 1,985,813.52
  5. Step 5: Solve for x
    x = 1,985,813.52/1,287.24
  6. Step 6: Final answer
    x = 1,542.69

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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.