Home / 1,087.21-1,631.11-470.77

Finding the Fourth Proportional to 1,087.21, 1,631.11 and 470.77

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Solution

The fourth proportional to 1,087.21, 1,631.11 and 470.77 is: 706.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.21 : 1,631.11 = 470.77 : x
  2. Step 2: Convert to fraction form
    1,087.21/1,631.11 = 470.77/x
  3. Step 3: Cross multiply
    1,087.21x = 1,631.11 × 470.77
  4. Step 4: Simplify right side
    1,087.21x = 767,877.65
  5. Step 5: Solve for x
    x = 767,877.65/1,087.21
  6. Step 6: Final answer
    x = 706.28

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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.