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Finding the Fourth Proportional to 285.35, 392.69 and 264.69

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Solution

The fourth proportional to 285.35, 392.69 and 264.69 is: 364.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.35 : 392.69 = 264.69 : x
  2. Step 2: Convert to fraction form
    285.35/392.69 = 264.69/x
  3. Step 3: Cross multiply
    285.35x = 392.69 × 264.69
  4. Step 4: Simplify right side
    285.35x = 103,939.79
  5. Step 5: Solve for x
    x = 103,939.79/285.35
  6. Step 6: Final answer
    x = 364.26

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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.