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Finding the Fourth Proportional to 256,506.35, 384,800.90 and 79,013.30

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Solution

The fourth proportional to 256,506.35, 384,800.90 and 79,013.30 is: 118,532.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,506.35 : 384,800.90 = 79,013.30 : x
  2. Step 2: Convert to fraction form
    256,506.35/384,800.90 = 79,013.30/x
  3. Step 3: Cross multiply
    256,506.35x = 384,800.90 × 79,013.30
  4. Step 4: Simplify right side
    256,506.35x = 30,404,386,632.90
  5. Step 5: Solve for x
    x = 30,404,386,632.90/256,506.35
  6. Step 6: Final answer
    x = 118,532.69

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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.