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Finding the Fourth Proportional to 5,779.90, 7,976.25 and 3,127.31

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Solution

The fourth proportional to 5,779.90, 7,976.25 and 3,127.31 is: 4,315.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,779.90 : 7,976.25 = 3,127.31 : x
  2. Step 2: Convert to fraction form
    5,779.90/7,976.25 = 3,127.31/x
  3. Step 3: Cross multiply
    5,779.90x = 7,976.25 × 3,127.31
  4. Step 4: Simplify right side
    5,779.90x = 24,944,206.39
  5. Step 5: Solve for x
    x = 24,944,206.39/5,779.90
  6. Step 6: Final answer
    x = 4,315.68

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1.5x scale

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.