Home / 1,780.30-2,670.45-1,197.10

Finding the Fourth Proportional to 1,780.30, 2,670.45 and 1,197.10

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Solution

The fourth proportional to 1,780.30, 2,670.45 and 1,197.10 is: 1,795.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,780.30 : 2,670.45 = 1,197.10 : x
  2. Step 2: Convert to fraction form
    1,780.30/2,670.45 = 1,197.10/x
  3. Step 3: Cross multiply
    1,780.30x = 2,670.45 × 1,197.10
  4. Step 4: Simplify right side
    1,780.30x = 3,196,795.70
  5. Step 5: Solve for x
    x = 3,196,795.70/1,780.30
  6. Step 6: Final answer
    x = 1,795.65

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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.