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Finding the Fourth Proportional to 572.64, 858.40 and 298.76

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Solution

The fourth proportional to 572.64, 858.40 and 298.76 is: 447.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.64 : 858.40 = 298.76 : x
  2. Step 2: Convert to fraction form
    572.64/858.40 = 298.76/x
  3. Step 3: Cross multiply
    572.64x = 858.40 × 298.76
  4. Step 4: Simplify right side
    572.64x = 256,455.58
  5. Step 5: Solve for x
    x = 256,455.58/572.64
  6. Step 6: Final answer
    x = 447.85

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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.