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Finding the Fourth Proportional to 431,579.76, 645,635.04 and 373,043.76

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Solution

The fourth proportional to 431,579.76, 645,635.04 and 373,043.76 is: 558,066.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,579.76 : 645,635.04 = 373,043.76 : x
  2. Step 2: Convert to fraction form
    431,579.76/645,635.04 = 373,043.76/x
  3. Step 3: Cross multiply
    431,579.76x = 645,635.04 × 373,043.76
  4. Step 4: Simplify right side
    431,579.76x = 240,850,122,909.35
  5. Step 5: Solve for x
    x = 240,850,122,909.35/431,579.76
  6. Step 6: Final answer
    x = 558,066.31

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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.