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Finding the Fourth Proportional to 1,355.21, 2,032.79 and 624.79

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Solution

The fourth proportional to 1,355.21, 2,032.79 and 624.79 is: 937.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355.21 : 2,032.79 = 624.79 : x
  2. Step 2: Convert to fraction form
    1,355.21/2,032.79 = 624.79/x
  3. Step 3: Cross multiply
    1,355.21x = 2,032.79 × 624.79
  4. Step 4: Simplify right side
    1,355.21x = 1,270,068.62
  5. Step 5: Solve for x
    x = 1,270,068.62/1,355.21
  6. Step 6: Final answer
    x = 937.17

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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.