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Finding the Fourth Proportional to 1,779.20, 2,668.96 and 624.96

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Solution

The fourth proportional to 1,779.20, 2,668.96 and 624.96 is: 937.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,779.20 : 2,668.96 = 624.96 : x
  2. Step 2: Convert to fraction form
    1,779.20/2,668.96 = 624.96/x
  3. Step 3: Cross multiply
    1,779.20x = 2,668.96 × 624.96
  4. Step 4: Simplify right side
    1,779.20x = 1,667,993.24
  5. Step 5: Solve for x
    x = 1,667,993.24/1,779.20
  6. Step 6: Final answer
    x = 937.50

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1.5x scale

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.