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Finding the Fourth Proportional to 256,429.40, 353,670.80 and 239,240.84

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Solution

The fourth proportional to 256,429.40, 353,670.80 and 239,240.84 is: 329,964.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,429.40 : 353,670.80 = 239,240.84 : x
  2. Step 2: Convert to fraction form
    256,429.40/353,670.80 = 239,240.84/x
  3. Step 3: Cross multiply
    256,429.40x = 353,670.80 × 239,240.84
  4. Step 4: Simplify right side
    256,429.40x = 84,612,499,275.47
  5. Step 5: Solve for x
    x = 84,612,499,275.47/256,429.40
  6. Step 6: Final answer
    x = 329,964.11

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1.5x scale

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.