Home / 2,989.60-4,480.74-1,688.35

Finding the Fourth Proportional to 2,989.60, 4,480.74 and 1,688.35

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Solution

The fourth proportional to 2,989.60, 4,480.74 and 1,688.35 is: 2,530.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,989.60 : 4,480.74 = 1,688.35 : x
  2. Step 2: Convert to fraction form
    2,989.60/4,480.74 = 1,688.35/x
  3. Step 3: Cross multiply
    2,989.60x = 4,480.74 × 1,688.35
  4. Step 4: Simplify right side
    2,989.60x = 7,565,057.38
  5. Step 5: Solve for x
    x = 7,565,057.38/2,989.60
  6. Step 6: Final answer
    x = 2,530.46

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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.