Home / 780,144.30-1,170,216.45-380,579.40

Finding the Fourth Proportional to 780,144.30, 1,170,216.45 and 380,579.40

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Solution

The fourth proportional to 780,144.30, 1,170,216.45 and 380,579.40 is: 570,869.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,144.30 : 1,170,216.45 = 380,579.40 : x
  2. Step 2: Convert to fraction form
    780,144.30/1,170,216.45 = 380,579.40/x
  3. Step 3: Cross multiply
    780,144.30x = 1,170,216.45 × 380,579.40
  4. Step 4: Simplify right side
    780,144.30x = 445,360,274,411.13
  5. Step 5: Solve for x
    x = 445,360,274,411.13/780,144.30
  6. Step 6: Final answer
    x = 570,869.10

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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.