Home / 3,465.60-5,197.20-999.78

Finding the Fourth Proportional to 3,465.60, 5,197.20 and 999.78

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Solution

The fourth proportional to 3,465.60, 5,197.20 and 999.78 is: 1,499.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,465.60 : 5,197.20 = 999.78 : x
  2. Step 2: Convert to fraction form
    3,465.60/5,197.20 = 999.78/x
  3. Step 3: Cross multiply
    3,465.60x = 5,197.20 × 999.78
  4. Step 4: Simplify right side
    3,465.60x = 5,196,056.62
  5. Step 5: Solve for x
    x = 5,196,056.62/3,465.60
  6. Step 6: Final answer
    x = 1,499.32

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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.