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Finding the Fourth Proportional to 518,917.48, 778,601.01 and 278,751.16

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Solution

The fourth proportional to 518,917.48, 778,601.01 and 278,751.16 is: 418,247.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,917.48 : 778,601.01 = 278,751.16 : x
  2. Step 2: Convert to fraction form
    518,917.48/778,601.01 = 278,751.16/x
  3. Step 3: Cross multiply
    518,917.48x = 778,601.01 × 278,751.16
  4. Step 4: Simplify right side
    518,917.48x = 217,035,934,714.67
  5. Step 5: Solve for x
    x = 217,035,934,714.67/518,917.48
  6. Step 6: Final answer
    x = 418,247.49

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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.