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Finding the Fourth Proportional to 720,010.80, 1,078,979.40 and 320,324.40

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Solution

The fourth proportional to 720,010.80, 1,078,979.40 and 320,324.40 is: 480,025.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,010.80 : 1,078,979.40 = 320,324.40 : x
  2. Step 2: Convert to fraction form
    720,010.80/1,078,979.40 = 320,324.40/x
  3. Step 3: Cross multiply
    720,010.80x = 1,078,979.40 × 320,324.40
  4. Step 4: Simplify right side
    720,010.80x = 345,623,428,917.36
  5. Step 5: Solve for x
    x = 345,623,428,917.36/720,010.80
  6. Step 6: Final answer
    x = 480,025.34

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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.