Home / 645,910.46-891,795.39-404,290.70

Finding the Fourth Proportional to 645,910.46, 891,795.39 and 404,290.70

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Solution

The fourth proportional to 645,910.46, 891,795.39 and 404,290.70 is: 558,195.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,910.46 : 891,795.39 = 404,290.70 : x
  2. Step 2: Convert to fraction form
    645,910.46/891,795.39 = 404,290.70/x
  3. Step 3: Cross multiply
    645,910.46x = 891,795.39 × 404,290.70
  4. Step 4: Simplify right side
    645,910.46x = 360,544,582,479.87
  5. Step 5: Solve for x
    x = 360,544,582,479.87/645,910.46
  6. Step 6: Final answer
    x = 558,195.92

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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.