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Finding the Fourth Proportional to 324,439.40, 486,659.10 and 286,385.60

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Solution

The fourth proportional to 324,439.40, 486,659.10 and 286,385.60 is: 429,578.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,439.40 : 486,659.10 = 286,385.60 : x
  2. Step 2: Convert to fraction form
    324,439.40/486,659.10 = 286,385.60/x
  3. Step 3: Cross multiply
    324,439.40x = 486,659.10 × 286,385.60
  4. Step 4: Simplify right side
    324,439.40x = 139,372,158,348.96
  5. Step 5: Solve for x
    x = 139,372,158,348.96/324,439.40
  6. Step 6: Final answer
    x = 429,578.40

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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.