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Finding the Fourth Proportional to 772.68, 1,065.80 and 441.02

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Solution

The fourth proportional to 772.68, 1,065.80 and 441.02 is: 608.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    772.68 : 1,065.80 = 441.02 : x
  2. Step 2: Convert to fraction form
    772.68/1,065.80 = 441.02/x
  3. Step 3: Cross multiply
    772.68x = 1,065.80 × 441.02
  4. Step 4: Simplify right side
    772.68x = 470,039.12
  5. Step 5: Solve for x
    x = 470,039.12/772.68
  6. Step 6: Final answer
    x = 608.32

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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.