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Finding the Fourth Proportional to 479,752, 661,442.40 and 393,392.96

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Solution

The fourth proportional to 479,752, 661,442.40 and 393,392.96 is: 542,377.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,752 : 661,442.40 = 393,392.96 : x
  2. Step 2: Convert to fraction form
    479,752/661,442.40 = 393,392.96/x
  3. Step 3: Cross multiply
    479,752x = 661,442.40 × 393,392.96
  4. Step 4: Simplify right side
    479,752x = 260,206,783,605.50
  5. Step 5: Solve for x
    x = 260,206,783,605.50/479,752
  6. Step 6: Final answer
    x = 542,377.69

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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.