Home / 1,124.55-1,684.80-1,056.78

Finding the Fourth Proportional to 1,124.55, 1,684.80 and 1,056.78

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Solution

The fourth proportional to 1,124.55, 1,684.80 and 1,056.78 is: 1,583.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,124.55 : 1,684.80 = 1,056.78 : x
  2. Step 2: Convert to fraction form
    1,124.55/1,684.80 = 1,056.78/x
  3. Step 3: Cross multiply
    1,124.55x = 1,684.80 × 1,056.78
  4. Step 4: Simplify right side
    1,124.55x = 1,780,462.94
  5. Step 5: Solve for x
    x = 1,780,462.94/1,124.55
  6. Step 6: Final answer
    x = 1,583.27

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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.