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Finding the Fourth Proportional to 619.79, 928.49 and 346.01

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Solution

The fourth proportional to 619.79, 928.49 and 346.01 is: 518.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.79 : 928.49 = 346.01 : x
  2. Step 2: Convert to fraction form
    619.79/928.49 = 346.01/x
  3. Step 3: Cross multiply
    619.79x = 928.49 × 346.01
  4. Step 4: Simplify right side
    619.79x = 321,260.45
  5. Step 5: Solve for x
    x = 321,260.45/619.79
  6. Step 6: Final answer
    x = 518.34

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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.