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Finding the Fourth Proportional to 689,679.98, 951,615.72 and 403,144.64

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Solution

The fourth proportional to 689,679.98, 951,615.72 and 403,144.64 is: 556,256.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,679.98 : 951,615.72 = 403,144.64 : x
  2. Step 2: Convert to fraction form
    689,679.98/951,615.72 = 403,144.64/x
  3. Step 3: Cross multiply
    689,679.98x = 951,615.72 × 403,144.64
  4. Step 4: Simplify right side
    689,679.98x = 383,638,776,857.74
  5. Step 5: Solve for x
    x = 383,638,776,857.74/689,679.98
  6. Step 6: Final answer
    x = 556,256.22

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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.