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Finding the Fourth Proportional to 607,648.74, 911,667.81 and 425,469.30

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Solution

The fourth proportional to 607,648.74, 911,667.81 and 425,469.30 is: 638,340.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    607,648.74 : 911,667.81 = 425,469.30 : x
  2. Step 2: Convert to fraction form
    607,648.74/911,667.81 = 425,469.30/x
  3. Step 3: Cross multiply
    607,648.74x = 911,667.81 × 425,469.30
  4. Step 4: Simplify right side
    607,648.74x = 387,886,664,953.23
  5. Step 5: Solve for x
    x = 387,886,664,953.23/607,648.74
  6. Step 6: Final answer
    x = 638,340.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.