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Finding the Fourth Proportional to 2,465.28, 3,698.28 and 821.52

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Solution

The fourth proportional to 2,465.28, 3,698.28 and 821.52 is: 1,232.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,465.28 : 3,698.28 = 821.52 : x
  2. Step 2: Convert to fraction form
    2,465.28/3,698.28 = 821.52/x
  3. Step 3: Cross multiply
    2,465.28x = 3,698.28 × 821.52
  4. Step 4: Simplify right side
    2,465.28x = 3,038,210.99
  5. Step 5: Solve for x
    x = 3,038,210.99/2,465.28
  6. Step 6: Final answer
    x = 1,232.40

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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.