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Finding the Fourth Proportional to 738.65, 1,019.14 and 443.86

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Solution

The fourth proportional to 738.65, 1,019.14 and 443.86 is: 612.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.65 : 1,019.14 = 443.86 : x
  2. Step 2: Convert to fraction form
    738.65/1,019.14 = 443.86/x
  3. Step 3: Cross multiply
    738.65x = 1,019.14 × 443.86
  4. Step 4: Simplify right side
    738.65x = 452,351.82
  5. Step 5: Solve for x
    x = 452,351.82/738.65
  6. Step 6: Final answer
    x = 612.40

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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.