Home / 689,305.20-1,034,735.40-408,980.40

Finding the Fourth Proportional to 689,305.20, 1,034,735.40 and 408,980.40

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Solution

The fourth proportional to 689,305.20, 1,034,735.40 and 408,980.40 is: 613,931.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,305.20 : 1,034,735.40 = 408,980.40 : x
  2. Step 2: Convert to fraction form
    689,305.20/1,034,735.40 = 408,980.40/x
  3. Step 3: Cross multiply
    689,305.20x = 1,034,735.40 × 408,980.40
  4. Step 4: Simplify right side
    689,305.20x = 423,186,497,786.16
  5. Step 5: Solve for x
    x = 423,186,497,786.16/689,305.20
  6. Step 6: Final answer
    x = 613,931.97

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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.