Home / 780,987.86-1,170,144.47-426,250.79

Finding the Fourth Proportional to 780,987.86, 1,170,144.47 and 426,250.79

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Solution

The fourth proportional to 780,987.86, 1,170,144.47 and 426,250.79 is: 638,646.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,987.86 : 1,170,144.47 = 426,250.79 : x
  2. Step 2: Convert to fraction form
    780,987.86/1,170,144.47 = 426,250.79/x
  3. Step 3: Cross multiply
    780,987.86x = 1,170,144.47 × 426,250.79
  4. Step 4: Simplify right side
    780,987.86x = 498,774,996,769.66
  5. Step 5: Solve for x
    x = 498,774,996,769.66/780,987.86
  6. Step 6: Final answer
    x = 638,646.29

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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.