Home / 780,145.80-1,170,218.70-425,851.80

Finding the Fourth Proportional to 780,145.80, 1,170,218.70 and 425,851.80

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Solution

The fourth proportional to 780,145.80, 1,170,218.70 and 425,851.80 is: 638,777.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,145.80 : 1,170,218.70 = 425,851.80 : x
  2. Step 2: Convert to fraction form
    780,145.80/1,170,218.70 = 425,851.80/x
  3. Step 3: Cross multiply
    780,145.80x = 1,170,218.70 × 425,851.80
  4. Step 4: Simplify right side
    780,145.80x = 498,339,739,788.66
  5. Step 5: Solve for x
    x = 498,339,739,788.66/780,145.80
  6. Step 6: Final answer
    x = 638,777.70

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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.