Home / 1,125.40-1,684.60-1,029.70

Finding the Fourth Proportional to 1,125.40, 1,684.60 and 1,029.70

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Solution

The fourth proportional to 1,125.40, 1,684.60 and 1,029.70 is: 1,541.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,125.40 : 1,684.60 = 1,029.70 : x
  2. Step 2: Convert to fraction form
    1,125.40/1,684.60 = 1,029.70/x
  3. Step 3: Cross multiply
    1,125.40x = 1,684.60 × 1,029.70
  4. Step 4: Simplify right side
    1,125.40x = 1,734,632.62
  5. Step 5: Solve for x
    x = 1,734,632.62/1,125.40
  6. Step 6: Final answer
    x = 1,541.35

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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.