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Finding the Fourth Proportional to 524.40, 787.01 and 318.93

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Solution

The fourth proportional to 524.40, 787.01 and 318.93 is: 478.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    524.40 : 787.01 = 318.93 : x
  2. Step 2: Convert to fraction form
    524.40/787.01 = 318.93/x
  3. Step 3: Cross multiply
    524.40x = 787.01 × 318.93
  4. Step 4: Simplify right side
    524.40x = 250,999.50
  5. Step 5: Solve for x
    x = 250,999.50/524.40
  6. Step 6: Final answer
    x = 478.64

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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.