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Finding the Fourth Proportional to 738.55, 1,019.31 and 443.83

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Solution

The fourth proportional to 738.55, 1,019.31 and 443.83 is: 612.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.55 : 1,019.31 = 443.83 : x
  2. Step 2: Convert to fraction form
    738.55/1,019.31 = 443.83/x
  3. Step 3: Cross multiply
    738.55x = 1,019.31 × 443.83
  4. Step 4: Simplify right side
    738.55x = 452,400.36
  5. Step 5: Solve for x
    x = 452,400.36/738.55
  6. Step 6: Final answer
    x = 612.55

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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.