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Finding the Fourth Proportional to 827,358.69, 1,239,889.86 and 376,978.89

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Solution

The fourth proportional to 827,358.69, 1,239,889.86 and 376,978.89 is: 564,945.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    827,358.69 : 1,239,889.86 = 376,978.89 : x
  2. Step 2: Convert to fraction form
    827,358.69/1,239,889.86 = 376,978.89/x
  3. Step 3: Cross multiply
    827,358.69x = 1,239,889.86 × 376,978.89
  4. Step 4: Simplify right side
    827,358.69x = 467,412,303,145.06
  5. Step 5: Solve for x
    x = 467,412,303,145.06/827,358.69
  6. Step 6: Final answer
    x = 564,945.18

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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.