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Finding the Fourth Proportional to 256,814.20, 385,658.70 and 168,459.40

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Solution

The fourth proportional to 256,814.20, 385,658.70 and 168,459.40 is: 252,976.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,814.20 : 385,658.70 = 168,459.40 : x
  2. Step 2: Convert to fraction form
    256,814.20/385,658.70 = 168,459.40/x
  3. Step 3: Cross multiply
    256,814.20x = 385,658.70 × 168,459.40
  4. Step 4: Simplify right side
    256,814.20x = 64,967,833,206.78
  5. Step 5: Solve for x
    x = 64,967,833,206.78/256,814.20
  6. Step 6: Final answer
    x = 252,976.02

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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.