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Finding the Fourth Proportional to 256,959.15, 385,456.95 and 79,480.46

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Solution

The fourth proportional to 256,959.15, 385,456.95 and 79,480.46 is: 119,226.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,959.15 : 385,456.95 = 79,480.46 : x
  2. Step 2: Convert to fraction form
    256,959.15/385,456.95 = 79,480.46/x
  3. Step 3: Cross multiply
    256,959.15x = 385,456.95 × 79,480.46
  4. Step 4: Simplify right side
    256,959.15x = 30,636,293,768.91
  5. Step 5: Solve for x
    x = 30,636,293,768.91/256,959.15
  6. Step 6: Final answer
    x = 119,226.32

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1.5x scale

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.