Home / 2,465.10-3,698.20-821.60

Finding the Fourth Proportional to 2,465.10, 3,698.20 and 821.60

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Solution

The fourth proportional to 2,465.10, 3,698.20 and 821.60 is: 1,232.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,465.10 : 3,698.20 = 821.60 : x
  2. Step 2: Convert to fraction form
    2,465.10/3,698.20 = 821.60/x
  3. Step 3: Cross multiply
    2,465.10x = 3,698.20 × 821.60
  4. Step 4: Simplify right side
    2,465.10x = 3,038,441.12
  5. Step 5: Solve for x
    x = 3,038,441.12/2,465.10
  6. Step 6: Final answer
    x = 1,232.58

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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.