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Finding the Fourth Proportional to 386,423.78, 579,524.90 and 130,228.45

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Solution

The fourth proportional to 386,423.78, 579,524.90 and 130,228.45 is: 195,305.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,423.78 : 579,524.90 = 130,228.45 : x
  2. Step 2: Convert to fraction form
    386,423.78/579,524.90 = 130,228.45/x
  3. Step 3: Cross multiply
    386,423.78x = 579,524.90 × 130,228.45
  4. Step 4: Simplify right side
    386,423.78x = 75,470,627,363.45
  5. Step 5: Solve for x
    x = 75,470,627,363.45/386,423.78
  6. Step 6: Final answer
    x = 195,305.34

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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.