Home / 1,059.20-1,587.36-442.16

Finding the Fourth Proportional to 1,059.20, 1,587.36 and 442.16

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Solution

The fourth proportional to 1,059.20, 1,587.36 and 442.16 is: 662.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,059.20 : 1,587.36 = 442.16 : x
  2. Step 2: Convert to fraction form
    1,059.20/1,587.36 = 442.16/x
  3. Step 3: Cross multiply
    1,059.20x = 1,587.36 × 442.16
  4. Step 4: Simplify right side
    1,059.20x = 701,867.10
  5. Step 5: Solve for x
    x = 701,867.10/1,059.20
  6. Step 6: Final answer
    x = 662.64

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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.