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Finding the Fourth Proportional to 319,907.72, 441,269.90 and 243,258.78

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Solution

The fourth proportional to 319,907.72, 441,269.90 and 243,258.78 is: 335,542.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,907.72 : 441,269.90 = 243,258.78 : x
  2. Step 2: Convert to fraction form
    319,907.72/441,269.90 = 243,258.78/x
  3. Step 3: Cross multiply
    319,907.72x = 441,269.90 × 243,258.78
  4. Step 4: Simplify right side
    319,907.72x = 107,342,776,122.79
  5. Step 5: Solve for x
    x = 107,342,776,122.79/319,907.72
  6. Step 6: Final answer
    x = 335,542.94

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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.