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Finding the Fourth Proportional to 324,009.60, 486,014.40 and 279,686.40

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Solution

The fourth proportional to 324,009.60, 486,014.40 and 279,686.40 is: 419,529.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,009.60 : 486,014.40 = 279,686.40 : x
  2. Step 2: Convert to fraction form
    324,009.60/486,014.40 = 279,686.40/x
  3. Step 3: Cross multiply
    324,009.60x = 486,014.40 × 279,686.40
  4. Step 4: Simplify right side
    324,009.60x = 135,931,617,884.16
  5. Step 5: Solve for x
    x = 135,931,617,884.16/324,009.60
  6. Step 6: Final answer
    x = 419,529.60

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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.