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Finding the Fourth Proportional to 7,326.98, 10,990.50 and 1,780.30

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Solution

The fourth proportional to 7,326.98, 10,990.50 and 1,780.30 is: 2,670.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,326.98 : 10,990.50 = 1,780.30 : x
  2. Step 2: Convert to fraction form
    7,326.98/10,990.50 = 1,780.30/x
  3. Step 3: Cross multiply
    7,326.98x = 10,990.50 × 1,780.30
  4. Step 4: Simplify right side
    7,326.98x = 19,566,387.15
  5. Step 5: Solve for x
    x = 19,566,387.15/7,326.98
  6. Step 6: Final answer
    x = 2,670.46

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Half scale
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Double scale
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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.