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Finding the Fourth Proportional to 524.88, 787.66 and 319.85

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Solution

The fourth proportional to 524.88, 787.66 and 319.85 is: 479.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    524.88 : 787.66 = 319.85 : x
  2. Step 2: Convert to fraction form
    524.88/787.66 = 319.85/x
  3. Step 3: Cross multiply
    524.88x = 787.66 × 319.85
  4. Step 4: Simplify right side
    524.88x = 251,931.27
  5. Step 5: Solve for x
    x = 251,931.27/524.88
  6. Step 6: Final answer
    x = 479.98

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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.