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Finding the Fourth Proportional to 524.81, 787.76 and 485.93

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Solution

The fourth proportional to 524.81, 787.76 and 485.93 is: 729.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    524.81 : 787.76 = 485.93 : x
  2. Step 2: Convert to fraction form
    524.81/787.76 = 485.93/x
  3. Step 3: Cross multiply
    524.81x = 787.76 × 485.93
  4. Step 4: Simplify right side
    524.81x = 382,796.22
  5. Step 5: Solve for x
    x = 382,796.22/524.81
  6. Step 6: Final answer
    x = 729.40

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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.