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Finding the Fourth Proportional to 7,325.78, 10,988.55 and 1,779.17

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Solution

The fourth proportional to 7,325.78, 10,988.55 and 1,779.17 is: 2,668.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,325.78 : 10,988.55 = 1,779.17 : x
  2. Step 2: Convert to fraction form
    7,325.78/10,988.55 = 1,779.17/x
  3. Step 3: Cross multiply
    7,325.78x = 10,988.55 × 1,779.17
  4. Step 4: Simplify right side
    7,325.78x = 19,550,443.56
  5. Step 5: Solve for x
    x = 19,550,443.56/7,325.78
  6. Step 6: Final answer
    x = 2,668.72

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Half scale
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Double scale
Find fourth proportional to 7,326.78, 10,990.05 and 1,780.17
Similar ratio
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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.