Home / 780,139.60-1,170,322.80-330,859.60

Finding the Fourth Proportional to 780,139.60, 1,170,322.80 and 330,859.60

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Solution

The fourth proportional to 780,139.60, 1,170,322.80 and 330,859.60 is: 496,337.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,139.60 : 1,170,322.80 = 330,859.60 : x
  2. Step 2: Convert to fraction form
    780,139.60/1,170,322.80 = 330,859.60/x
  3. Step 3: Cross multiply
    780,139.60x = 1,170,322.80 × 330,859.60
  4. Step 4: Simplify right side
    780,139.60x = 387,212,533,478.88
  5. Step 5: Solve for x
    x = 387,212,533,478.88/780,139.60
  6. Step 6: Final answer
    x = 496,337.49

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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.