Home / 1,088.76-1,631.70-439.98

Finding the Fourth Proportional to 1,088.76, 1,631.70 and 439.98

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Solution

The fourth proportional to 1,088.76, 1,631.70 and 439.98 is: 659.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,088.76 : 1,631.70 = 439.98 : x
  2. Step 2: Convert to fraction form
    1,088.76/1,631.70 = 439.98/x
  3. Step 3: Cross multiply
    1,088.76x = 1,631.70 × 439.98
  4. Step 4: Simplify right side
    1,088.76x = 717,915.37
  5. Step 5: Solve for x
    x = 717,915.37/1,088.76
  6. Step 6: Final answer
    x = 659.39

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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.