Home / 3,078.40-4,612.80-1,615.36

Finding the Fourth Proportional to 3,078.40, 4,612.80 and 1,615.36

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Solution

The fourth proportional to 3,078.40, 4,612.80 and 1,615.36 is: 2,420.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,078.40 : 4,612.80 = 1,615.36 : x
  2. Step 2: Convert to fraction form
    3,078.40/4,612.80 = 1,615.36/x
  3. Step 3: Cross multiply
    3,078.40x = 4,612.80 × 1,615.36
  4. Step 4: Simplify right side
    3,078.40x = 7,451,332.61
  5. Step 5: Solve for x
    x = 7,451,332.61/3,078.40
  6. Step 6: Final answer
    x = 2,420.52

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1.5x scale

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.