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Finding the Fourth Proportional to 402,529.40, 603,102.90 and 212,708.60

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Solution

The fourth proportional to 402,529.40, 603,102.90 and 212,708.60 is: 318,697.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,529.40 : 603,102.90 = 212,708.60 : x
  2. Step 2: Convert to fraction form
    402,529.40/603,102.90 = 212,708.60/x
  3. Step 3: Cross multiply
    402,529.40x = 603,102.90 × 212,708.60
  4. Step 4: Simplify right side
    402,529.40x = 128,285,173,514.94
  5. Step 5: Solve for x
    x = 128,285,173,514.94/402,529.40
  6. Step 6: Final answer
    x = 318,697.65

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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.