Home / 1,557.12-2,147.52-1,403.52

Finding the Fourth Proportional to 1,557.12, 2,147.52 and 1,403.52

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Solution

The fourth proportional to 1,557.12, 2,147.52 and 1,403.52 is: 1,935.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,557.12 : 2,147.52 = 1,403.52 : x
  2. Step 2: Convert to fraction form
    1,557.12/2,147.52 = 1,403.52/x
  3. Step 3: Cross multiply
    1,557.12x = 2,147.52 × 1,403.52
  4. Step 4: Simplify right side
    1,557.12x = 3,014,087.27
  5. Step 5: Solve for x
    x = 3,014,087.27/1,557.12
  6. Step 6: Final answer
    x = 1,935.68

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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.