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Finding the Fourth Proportional to 4,700.78, 7,050.60 and 1,238.30

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Solution

The fourth proportional to 4,700.78, 7,050.60 and 1,238.30 is: 1,857.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,700.78 : 7,050.60 = 1,238.30 : x
  2. Step 2: Convert to fraction form
    4,700.78/7,050.60 = 1,238.30/x
  3. Step 3: Cross multiply
    4,700.78x = 7,050.60 × 1,238.30
  4. Step 4: Simplify right side
    4,700.78x = 8,730,757.98
  5. Step 5: Solve for x
    x = 8,730,757.98/4,700.78
  6. Step 6: Final answer
    x = 1,857.30

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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.