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Finding the Fourth Proportional to 717,478.68, 990,083.19 and 445,540.82

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Solution

The fourth proportional to 717,478.68, 990,083.19 and 445,540.82 is: 614,823.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,478.68 : 990,083.19 = 445,540.82 : x
  2. Step 2: Convert to fraction form
    717,478.68/990,083.19 = 445,540.82/x
  3. Step 3: Cross multiply
    717,478.68x = 990,083.19 × 445,540.82
  4. Step 4: Simplify right side
    717,478.68x = 441,122,471,390.40
  5. Step 5: Solve for x
    x = 441,122,471,390.40/717,478.68
  6. Step 6: Final answer
    x = 614,823.11

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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.