Home / 729,890.40-1,007,190.72-407,581.20

Finding the Fourth Proportional to 729,890.40, 1,007,190.72 and 407,581.20

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Solution

The fourth proportional to 729,890.40, 1,007,190.72 and 407,581.20 is: 562,429.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    729,890.40 : 1,007,190.72 = 407,581.20 : x
  2. Step 2: Convert to fraction form
    729,890.40/1,007,190.72 = 407,581.20/x
  3. Step 3: Cross multiply
    729,890.40x = 1,007,190.72 × 407,581.20
  4. Step 4: Simplify right side
    729,890.40x = 410,512,002,286.46
  5. Step 5: Solve for x
    x = 410,512,002,286.46/729,890.40
  6. Step 6: Final answer
    x = 562,429.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.