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Finding the Fourth Proportional to 405,310.80, 607,908.60 and 124,856.40

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Solution

The fourth proportional to 405,310.80, 607,908.60 and 124,856.40 is: 187,266.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,310.80 : 607,908.60 = 124,856.40 : x
  2. Step 2: Convert to fraction form
    405,310.80/607,908.60 = 124,856.40/x
  3. Step 3: Cross multiply
    405,310.80x = 607,908.60 × 124,856.40
  4. Step 4: Simplify right side
    405,310.80x = 75,901,279,325.04
  5. Step 5: Solve for x
    x = 75,901,279,325.04/405,310.80
  6. Step 6: Final answer
    x = 187,266.86

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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.