Home / 870,176.70-1,305,265.05-515,007.90

Finding the Fourth Proportional to 870,176.70, 1,305,265.05 and 515,007.90

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Solution

The fourth proportional to 870,176.70, 1,305,265.05 and 515,007.90 is: 772,511.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,176.70 : 1,305,265.05 = 515,007.90 : x
  2. Step 2: Convert to fraction form
    870,176.70/1,305,265.05 = 515,007.90/x
  3. Step 3: Cross multiply
    870,176.70x = 1,305,265.05 × 515,007.90
  4. Step 4: Simplify right side
    870,176.70x = 672,221,812,343.90
  5. Step 5: Solve for x
    x = 672,221,812,343.90/870,176.70
  6. Step 6: Final answer
    x = 772,511.85

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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.