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Finding the Fourth Proportional to 689,671.98, 951,604.70 and 403,136.64

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Solution

The fourth proportional to 689,671.98, 951,604.70 and 403,136.64 is: 556,245.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,671.98 : 951,604.70 = 403,136.64 : x
  2. Step 2: Convert to fraction form
    689,671.98/951,604.70 = 403,136.64/x
  3. Step 3: Cross multiply
    689,671.98x = 951,604.70 × 403,136.64
  4. Step 4: Simplify right side
    689,671.98x = 383,626,719,350.53
  5. Step 5: Solve for x
    x = 383,626,719,350.53/689,671.98
  6. Step 6: Final answer
    x = 556,245.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.