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Finding the Fourth Proportional to 423.12, 583.52 and 357.76

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Solution

The fourth proportional to 423.12, 583.52 and 357.76 is: 493.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.12 : 583.52 = 357.76 : x
  2. Step 2: Convert to fraction form
    423.12/583.52 = 357.76/x
  3. Step 3: Cross multiply
    423.12x = 583.52 × 357.76
  4. Step 4: Simplify right side
    423.12x = 208,760.12
  5. Step 5: Solve for x
    x = 208,760.12/423.12
  6. Step 6: Final answer
    x = 493.38

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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.