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Finding the Fourth Proportional to 1,068.86, 1,600.40 and 554.78

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Solution

The fourth proportional to 1,068.86, 1,600.40 and 554.78 is: 830.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,068.86 : 1,600.40 = 554.78 : x
  2. Step 2: Convert to fraction form
    1,068.86/1,600.40 = 554.78/x
  3. Step 3: Cross multiply
    1,068.86x = 1,600.40 × 554.78
  4. Step 4: Simplify right side
    1,068.86x = 887,872.53
  5. Step 5: Solve for x
    x = 887,872.53/1,068.86
  6. Step 6: Final answer
    x = 830.67

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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.