Home / 780,643.80-1,170,090.90-331,288.20

Finding the Fourth Proportional to 780,643.80, 1,170,090.90 and 331,288.20

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Solution

The fourth proportional to 780,643.80, 1,170,090.90 and 331,288.20 is: 496,561.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,643.80 : 1,170,090.90 = 331,288.20 : x
  2. Step 2: Convert to fraction form
    780,643.80/1,170,090.90 = 331,288.20/x
  3. Step 3: Cross multiply
    780,643.80x = 1,170,090.90 × 331,288.20
  4. Step 4: Simplify right side
    780,643.80x = 387,637,308,097.38
  5. Step 5: Solve for x
    x = 387,637,308,097.38/780,643.80
  6. Step 6: Final answer
    x = 496,561.05

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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.