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Finding the Fourth Proportional to 441.54, 657.54 and 430.20

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Solution

The fourth proportional to 441.54, 657.54 and 430.20 is: 640.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    441.54 : 657.54 = 430.20 : x
  2. Step 2: Convert to fraction form
    441.54/657.54 = 430.20/x
  3. Step 3: Cross multiply
    441.54x = 657.54 × 430.20
  4. Step 4: Simplify right side
    441.54x = 282,873.71
  5. Step 5: Solve for x
    x = 282,873.71/441.54
  6. Step 6: Final answer
    x = 640.65

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.