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Finding the Fourth Proportional to 484,979.38, 669,153.51 and 319,390.26

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Solution

The fourth proportional to 484,979.38, 669,153.51 and 319,390.26 is: 440,680.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    484,979.38 : 669,153.51 = 319,390.26 : x
  2. Step 2: Convert to fraction form
    484,979.38/669,153.51 = 319,390.26/x
  3. Step 3: Cross multiply
    484,979.38x = 669,153.51 × 319,390.26
  4. Step 4: Simplify right side
    484,979.38x = 213,721,111,865.93
  5. Step 5: Solve for x
    x = 213,721,111,865.93/484,979.38
  6. Step 6: Final answer
    x = 440,680.82

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1.5x scale

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.