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Finding the Fourth Proportional to 420,395.69, 630,814.97 and 243,027.27

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Solution

The fourth proportional to 420,395.69, 630,814.97 and 243,027.27 is: 364,668.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,395.69 : 630,814.97 = 243,027.27 : x
  2. Step 2: Convert to fraction form
    420,395.69/630,814.97 = 243,027.27/x
  3. Step 3: Cross multiply
    420,395.69x = 630,814.97 × 243,027.27
  4. Step 4: Simplify right side
    420,395.69x = 153,305,240,641.80
  5. Step 5: Solve for x
    x = 153,305,240,641.80/420,395.69
  6. Step 6: Final answer
    x = 364,668.91

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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.