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Finding the Fourth Proportional to 689,674.98, 951,608.82 and 403,139.64

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Solution

The fourth proportional to 689,674.98, 951,608.82 and 403,139.64 is: 556,249.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,674.98 : 951,608.82 = 403,139.64 : x
  2. Step 2: Convert to fraction form
    689,674.98/951,608.82 = 403,139.64/x
  3. Step 3: Cross multiply
    689,674.98x = 951,608.82 × 403,139.64
  4. Step 4: Simplify right side
    689,674.98x = 383,631,237,115.63
  5. Step 5: Solve for x
    x = 383,631,237,115.63/689,674.98
  6. Step 6: Final answer
    x = 556,249.32

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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.