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Finding the Fourth Proportional to 672,253.10, 1,008,379.65 and 520,037.90

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Solution

The fourth proportional to 672,253.10, 1,008,379.65 and 520,037.90 is: 780,056.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,253.10 : 1,008,379.65 = 520,037.90 : x
  2. Step 2: Convert to fraction form
    672,253.10/1,008,379.65 = 520,037.90/x
  3. Step 3: Cross multiply
    672,253.10x = 1,008,379.65 × 520,037.90
  4. Step 4: Simplify right side
    672,253.10x = 524,395,635,588.74
  5. Step 5: Solve for x
    x = 524,395,635,588.74/672,253.10
  6. Step 6: Final answer
    x = 780,056.85

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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.