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Finding the Fourth Proportional to 402,415.70, 603,404.85 and 136,039.10

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Solution

The fourth proportional to 402,415.70, 603,404.85 and 136,039.10 is: 203,984.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,415.70 : 603,404.85 = 136,039.10 : x
  2. Step 2: Convert to fraction form
    402,415.70/603,404.85 = 136,039.10/x
  3. Step 3: Cross multiply
    402,415.70x = 603,404.85 × 136,039.10
  4. Step 4: Simplify right side
    402,415.70x = 82,086,652,729.64
  5. Step 5: Solve for x
    x = 82,086,652,729.64/402,415.70
  6. Step 6: Final answer
    x = 203,984.72

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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.