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Finding the Fourth Proportional to 672,236.60, 1,008,354.90 and 520,021.40

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Solution

The fourth proportional to 672,236.60, 1,008,354.90 and 520,021.40 is: 780,032.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,236.60 : 1,008,354.90 = 520,021.40 : x
  2. Step 2: Convert to fraction form
    672,236.60/1,008,354.90 = 520,021.40/x
  3. Step 3: Cross multiply
    672,236.60x = 1,008,354.90 × 520,021.40
  4. Step 4: Simplify right side
    672,236.60x = 524,366,126,794.86
  5. Step 5: Solve for x
    x = 524,366,126,794.86/672,236.60
  6. Step 6: Final answer
    x = 780,032.10

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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.