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Finding the Fourth Proportional to 839,709.20, 1,259,563.80 and 341,430.80

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Solution

The fourth proportional to 839,709.20, 1,259,563.80 and 341,430.80 is: 512,146.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,709.20 : 1,259,563.80 = 341,430.80 : x
  2. Step 2: Convert to fraction form
    839,709.20/1,259,563.80 = 341,430.80/x
  3. Step 3: Cross multiply
    839,709.20x = 1,259,563.80 × 341,430.80
  4. Step 4: Simplify right side
    839,709.20x = 430,053,875,885.04
  5. Step 5: Solve for x
    x = 430,053,875,885.04/839,709.20
  6. Step 6: Final answer
    x = 512,146.20

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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.