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Finding the Fourth Proportional to 438,115.16, 604,320.54 and 287,221.88

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Solution

The fourth proportional to 438,115.16, 604,320.54 and 287,221.88 is: 396,183.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,115.16 : 604,320.54 = 287,221.88 : x
  2. Step 2: Convert to fraction form
    438,115.16/604,320.54 = 287,221.88/x
  3. Step 3: Cross multiply
    438,115.16x = 604,320.54 × 287,221.88
  4. Step 4: Simplify right side
    438,115.16x = 173,574,081,621.42
  5. Step 5: Solve for x
    x = 173,574,081,621.42/438,115.16
  6. Step 6: Final answer
    x = 396,183.69

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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.