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Finding the Fourth Proportional to 638,432.60, 957,648.90 and 414,483.80

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Solution

The fourth proportional to 638,432.60, 957,648.90 and 414,483.80 is: 621,725.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,432.60 : 957,648.90 = 414,483.80 : x
  2. Step 2: Convert to fraction form
    638,432.60/957,648.90 = 414,483.80/x
  3. Step 3: Cross multiply
    638,432.60x = 957,648.90 × 414,483.80
  4. Step 4: Simplify right side
    638,432.60x = 396,929,955,137.82
  5. Step 5: Solve for x
    x = 396,929,955,137.82/638,432.60
  6. Step 6: Final answer
    x = 621,725.70

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Similar ratio
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1.5x scale

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.