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Finding the Fourth Proportional to 256,476.71, 384,722.88 and 87,994.68

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Solution

The fourth proportional to 256,476.71, 384,722.88 and 87,994.68 is: 131,994.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,476.71 : 384,722.88 = 87,994.68 : x
  2. Step 2: Convert to fraction form
    256,476.71/384,722.88 = 87,994.68/x
  3. Step 3: Cross multiply
    256,476.71x = 384,722.88 × 87,994.68
  4. Step 4: Simplify right side
    256,476.71x = 33,853,564,941.59
  5. Step 5: Solve for x
    x = 33,853,564,941.59/256,476.71
  6. Step 6: Final answer
    x = 131,994.69

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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.