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Finding the Fourth Proportional to 509.46, 762.78 and 370.79

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Solution

The fourth proportional to 509.46, 762.78 and 370.79 is: 555.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.46 : 762.78 = 370.79 : x
  2. Step 2: Convert to fraction form
    509.46/762.78 = 370.79/x
  3. Step 3: Cross multiply
    509.46x = 762.78 × 370.79
  4. Step 4: Simplify right side
    509.46x = 282,831.63
  5. Step 5: Solve for x
    x = 282,831.63/509.46
  6. Step 6: Final answer
    x = 555.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.