Home / 2,880.78-4,318.93-1,125.51

Finding the Fourth Proportional to 2,880.78, 4,318.93 and 1,125.51

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Solution

The fourth proportional to 2,880.78, 4,318.93 and 1,125.51 is: 1,687.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,880.78 : 4,318.93 = 1,125.51 : x
  2. Step 2: Convert to fraction form
    2,880.78/4,318.93 = 1,125.51/x
  3. Step 3: Cross multiply
    2,880.78x = 4,318.93 × 1,125.51
  4. Step 4: Simplify right side
    2,880.78x = 4,860,998.90
  5. Step 5: Solve for x
    x = 4,860,998.90/2,880.78
  6. Step 6: Final answer
    x = 1,687.39

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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.