Home / 780,145.80-1,170,218.70-654,174.60

Finding the Fourth Proportional to 780,145.80, 1,170,218.70 and 654,174.60

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Solution

The fourth proportional to 780,145.80, 1,170,218.70 and 654,174.60 is: 981,261.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,145.80 : 1,170,218.70 = 654,174.60 : x
  2. Step 2: Convert to fraction form
    780,145.80/1,170,218.70 = 654,174.60/x
  3. Step 3: Cross multiply
    780,145.80x = 1,170,218.70 × 654,174.60
  4. Step 4: Simplify right side
    780,145.80x = 765,527,349,985.02
  5. Step 5: Solve for x
    x = 765,527,349,985.02/780,145.80
  6. Step 6: Final answer
    x = 981,261.90

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Double scale
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Similar ratio
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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.