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Finding the Fourth Proportional to 630,979.20, 946,468.80 and 394,783.20

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Solution

The fourth proportional to 630,979.20, 946,468.80 and 394,783.20 is: 592,174.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,979.20 : 946,468.80 = 394,783.20 : x
  2. Step 2: Convert to fraction form
    630,979.20/946,468.80 = 394,783.20/x
  3. Step 3: Cross multiply
    630,979.20x = 946,468.80 × 394,783.20
  4. Step 4: Simplify right side
    630,979.20x = 373,649,981,564.16
  5. Step 5: Solve for x
    x = 373,649,981,564.16/630,979.20
  6. Step 6: Final answer
    x = 592,174.80

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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.