Home / 780,987.87-1,170,144.48-426,250.80

Finding the Fourth Proportional to 780,987.87, 1,170,144.48 and 426,250.80

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Solution

The fourth proportional to 780,987.87, 1,170,144.48 and 426,250.80 is: 638,646.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,987.87 : 1,170,144.48 = 426,250.80 : x
  2. Step 2: Convert to fraction form
    780,987.87/1,170,144.48 = 426,250.80/x
  3. Step 3: Cross multiply
    780,987.87x = 1,170,144.48 × 426,250.80
  4. Step 4: Simplify right side
    780,987.87x = 498,775,020,715.58
  5. Step 5: Solve for x
    x = 498,775,020,715.58/780,987.87
  6. Step 6: Final answer
    x = 638,646.31

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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.