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Finding the Fourth Proportional to 423.30, 583.74 and 340.68

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Solution

The fourth proportional to 423.30, 583.74 and 340.68 is: 469.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.30 : 583.74 = 340.68 : x
  2. Step 2: Convert to fraction form
    423.30/583.74 = 340.68/x
  3. Step 3: Cross multiply
    423.30x = 583.74 × 340.68
  4. Step 4: Simplify right side
    423.30x = 198,868.54
  5. Step 5: Solve for x
    x = 198,868.54/423.30
  6. Step 6: Final answer
    x = 469.81

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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.