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Finding the Fourth Proportional to 256,939.40, 385,409.10 and 168,465.80

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Solution

The fourth proportional to 256,939.40, 385,409.10 and 168,465.80 is: 252,698.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,939.40 : 385,409.10 = 168,465.80 : x
  2. Step 2: Convert to fraction form
    256,939.40/385,409.10 = 168,465.80/x
  3. Step 3: Cross multiply
    256,939.40x = 385,409.10 × 168,465.80
  4. Step 4: Simplify right side
    256,939.40x = 64,928,252,358.78
  5. Step 5: Solve for x
    x = 64,928,252,358.78/256,939.40
  6. Step 6: Final answer
    x = 252,698.70

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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.