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Finding the Fourth Proportional to 485,404.38, 669,858.79 and 270,539.83

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Solution

The fourth proportional to 485,404.38, 669,858.79 and 270,539.83 is: 373,345.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,404.38 : 669,858.79 = 270,539.83 : x
  2. Step 2: Convert to fraction form
    485,404.38/669,858.79 = 270,539.83/x
  3. Step 3: Cross multiply
    485,404.38x = 669,858.79 × 270,539.83
  4. Step 4: Simplify right side
    485,404.38x = 181,223,484,668.05
  5. Step 5: Solve for x
    x = 181,223,484,668.05/485,404.38
  6. Step 6: Final answer
    x = 373,345.38

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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.