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Finding the Fourth Proportional to 292.93, 439.80 and 256.30

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Solution

The fourth proportional to 292.93, 439.80 and 256.30 is: 384.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    292.93 : 439.80 = 256.30 : x
  2. Step 2: Convert to fraction form
    292.93/439.80 = 256.30/x
  3. Step 3: Cross multiply
    292.93x = 439.80 × 256.30
  4. Step 4: Simplify right side
    292.93x = 112,720.74
  5. Step 5: Solve for x
    x = 112,720.74/292.93
  6. Step 6: Final answer
    x = 384.80

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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.