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Finding the Fourth Proportional to 2,780.12, 4,170.04 and 700.13

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Solution

The fourth proportional to 2,780.12, 4,170.04 and 700.13 is: 1,050.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.12 : 4,170.04 = 700.13 : x
  2. Step 2: Convert to fraction form
    2,780.12/4,170.04 = 700.13/x
  3. Step 3: Cross multiply
    2,780.12x = 4,170.04 × 700.13
  4. Step 4: Simplify right side
    2,780.12x = 2,919,547.50
  5. Step 5: Solve for x
    x = 2,919,547.50/2,780.12
  6. Step 6: Final answer
    x = 1,050.15

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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.