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Finding the Fourth Proportional to 689,673.74, 951,607.10 and 403,138.40

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Solution

The fourth proportional to 689,673.74, 951,607.10 and 403,138.40 is: 556,247.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,673.74 : 951,607.10 = 403,138.40 : x
  2. Step 2: Convert to fraction form
    689,673.74/951,607.10 = 403,138.40/x
  3. Step 3: Cross multiply
    689,673.74x = 951,607.10 × 403,138.40
  4. Step 4: Simplify right side
    689,673.74x = 383,629,363,722.64
  5. Step 5: Solve for x
    x = 383,629,363,722.64/689,673.74
  6. Step 6: Final answer
    x = 556,247.60

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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.