Home / 723,472.80-1,085,209.20-643,293.60

Finding the Fourth Proportional to 723,472.80, 1,085,209.20 and 643,293.60

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Solution

The fourth proportional to 723,472.80, 1,085,209.20 and 643,293.60 is: 964,940.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    723,472.80 : 1,085,209.20 = 643,293.60 : x
  2. Step 2: Convert to fraction form
    723,472.80/1,085,209.20 = 643,293.60/x
  3. Step 3: Cross multiply
    723,472.80x = 1,085,209.20 × 643,293.60
  4. Step 4: Simplify right side
    723,472.80x = 698,108,133,021.12
  5. Step 5: Solve for x
    x = 698,108,133,021.12/723,472.80
  6. Step 6: Final answer
    x = 964,940.40

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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.