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Finding the Fourth Proportional to 689,672.74, 951,605.72 and 403,137.40

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Solution

The fourth proportional to 689,672.74, 951,605.72 and 403,137.40 is: 556,246.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,672.74 : 951,605.72 = 403,137.40 : x
  2. Step 2: Convert to fraction form
    689,672.74/951,605.72 = 403,137.40/x
  3. Step 3: Cross multiply
    689,672.74x = 951,605.72 × 403,137.40
  4. Step 4: Simplify right side
    689,672.74x = 383,627,855,785.93
  5. Step 5: Solve for x
    x = 383,627,855,785.93/689,672.74
  6. Step 6: Final answer
    x = 556,246.22

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1.5x scale

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.