Home / 1,319.12-1,977.84-625.36

Finding the Fourth Proportional to 1,319.12, 1,977.84 and 625.36

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Solution

The fourth proportional to 1,319.12, 1,977.84 and 625.36 is: 937.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319.12 : 1,977.84 = 625.36 : x
  2. Step 2: Convert to fraction form
    1,319.12/1,977.84 = 625.36/x
  3. Step 3: Cross multiply
    1,319.12x = 1,977.84 × 625.36
  4. Step 4: Simplify right side
    1,319.12x = 1,236,862.02
  5. Step 5: Solve for x
    x = 1,236,862.02/1,319.12
  6. Step 6: Final answer
    x = 937.64

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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.