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Finding the Fourth Proportional to 775.65, 1,070.37 and 444.09

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Solution

The fourth proportional to 775.65, 1,070.37 and 444.09 is: 612.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    775.65 : 1,070.37 = 444.09 : x
  2. Step 2: Convert to fraction form
    775.65/1,070.37 = 444.09/x
  3. Step 3: Cross multiply
    775.65x = 1,070.37 × 444.09
  4. Step 4: Simplify right side
    775.65x = 475,340.61
  5. Step 5: Solve for x
    x = 475,340.61/775.65
  6. Step 6: Final answer
    x = 612.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.