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Finding the Fourth Proportional to 1,087.88, 1,631.96 and 357.50

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Solution

The fourth proportional to 1,087.88, 1,631.96 and 357.50 is: 536.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.88 : 1,631.96 = 357.50 : x
  2. Step 2: Convert to fraction form
    1,087.88/1,631.96 = 357.50/x
  3. Step 3: Cross multiply
    1,087.88x = 1,631.96 × 357.50
  4. Step 4: Simplify right side
    1,087.88x = 583,430.67
  5. Step 5: Solve for x
    x = 583,430.67/1,087.88
  6. Step 6: Final answer
    x = 536.30

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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.