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Finding the Fourth Proportional to 672,241.10, 1,008,361.65 and 520,025.90

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Solution

The fourth proportional to 672,241.10, 1,008,361.65 and 520,025.90 is: 780,038.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,241.10 : 1,008,361.65 = 520,025.90 : x
  2. Step 2: Convert to fraction form
    672,241.10/1,008,361.65 = 520,025.90/x
  3. Step 3: Cross multiply
    672,241.10x = 1,008,361.65 × 520,025.90
  4. Step 4: Simplify right side
    672,241.10x = 524,374,174,566.74
  5. Step 5: Solve for x
    x = 524,374,174,566.74/672,241.10
  6. Step 6: Final answer
    x = 780,038.85

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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.