Home / 1,087.90-1,631.75-471.49

Finding the Fourth Proportional to 1,087.90, 1,631.75 and 471.49

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Solution

The fourth proportional to 1,087.90, 1,631.75 and 471.49 is: 707.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.90 : 1,631.75 = 471.49 : x
  2. Step 2: Convert to fraction form
    1,087.90/1,631.75 = 471.49/x
  3. Step 3: Cross multiply
    1,087.90x = 1,631.75 × 471.49
  4. Step 4: Simplify right side
    1,087.90x = 769,347.37
  5. Step 5: Solve for x
    x = 769,347.37/1,087.90
  6. Step 6: Final answer
    x = 707.19

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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.