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Finding the Fourth Proportional to 823,809.20, 1,235,713.80 and 291,930.80

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Solution

The fourth proportional to 823,809.20, 1,235,713.80 and 291,930.80 is: 437,896.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    823,809.20 : 1,235,713.80 = 291,930.80 : x
  2. Step 2: Convert to fraction form
    823,809.20/1,235,713.80 = 291,930.80/x
  3. Step 3: Cross multiply
    823,809.20x = 1,235,713.80 × 291,930.80
  4. Step 4: Simplify right side
    823,809.20x = 360,742,918,205.04
  5. Step 5: Solve for x
    x = 360,742,918,205.04/823,809.20
  6. Step 6: Final answer
    x = 437,896.20

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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.