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Finding the Fourth Proportional to 1,355.03, 2,031.90 and 624.68

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Solution

The fourth proportional to 1,355.03, 2,031.90 and 624.68 is: 936.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355.03 : 2,031.90 = 624.68 : x
  2. Step 2: Convert to fraction form
    1,355.03/2,031.90 = 624.68/x
  3. Step 3: Cross multiply
    1,355.03x = 2,031.90 × 624.68
  4. Step 4: Simplify right side
    1,355.03x = 1,269,274.79
  5. Step 5: Solve for x
    x = 1,269,274.79/1,355.03
  6. Step 6: Final answer
    x = 936.72

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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.