Home / 780,037.20-1,170,055.80-691,390.80

Finding the Fourth Proportional to 780,037.20, 1,170,055.80 and 691,390.80

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Solution

The fourth proportional to 780,037.20, 1,170,055.80 and 691,390.80 is: 1,037,086.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,037.20 : 1,170,055.80 = 691,390.80 : x
  2. Step 2: Convert to fraction form
    780,037.20/1,170,055.80 = 691,390.80/x
  3. Step 3: Cross multiply
    780,037.20x = 1,170,055.80 × 691,390.80
  4. Step 4: Simplify right side
    780,037.20x = 808,965,815,606.64
  5. Step 5: Solve for x
    x = 808,965,815,606.64/780,037.20
  6. Step 6: Final answer
    x = 1,037,086.20

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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.