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Finding the Fourth Proportional to 371,907.30, 513,479.23 and 285,712.76

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Solution

The fourth proportional to 371,907.30, 513,479.23 and 285,712.76 is: 394,473.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,907.30 : 513,479.23 = 285,712.76 : x
  2. Step 2: Convert to fraction form
    371,907.30/513,479.23 = 285,712.76/x
  3. Step 3: Cross multiply
    371,907.30x = 513,479.23 × 285,712.76
  4. Step 4: Simplify right side
    371,907.30x = 146,707,568,005.98
  5. Step 5: Solve for x
    x = 146,707,568,005.98/371,907.30
  6. Step 6: Final answer
    x = 394,473.48

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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.