Home / 1,124.20-1,684.70-986.60

Finding the Fourth Proportional to 1,124.20, 1,684.70 and 986.60

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Solution

The fourth proportional to 1,124.20, 1,684.70 and 986.60 is: 1,478.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,124.20 : 1,684.70 = 986.60 : x
  2. Step 2: Convert to fraction form
    1,124.20/1,684.70 = 986.60/x
  3. Step 3: Cross multiply
    1,124.20x = 1,684.70 × 986.60
  4. Step 4: Simplify right side
    1,124.20x = 1,662,125.02
  5. Step 5: Solve for x
    x = 1,662,125.02/1,124.20
  6. Step 6: Final answer
    x = 1,478.50

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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.