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Finding the Fourth Proportional to 717,889.15, 990,735.05 and 395,599.31

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Solution

The fourth proportional to 717,889.15, 990,735.05 and 395,599.31 is: 545,953.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,889.15 : 990,735.05 = 395,599.31 : x
  2. Step 2: Convert to fraction form
    717,889.15/990,735.05 = 395,599.31/x
  3. Step 3: Cross multiply
    717,889.15x = 990,735.05 × 395,599.31
  4. Step 4: Simplify right side
    717,889.15x = 391,934,099,698.15
  5. Step 5: Solve for x
    x = 391,934,099,698.15/717,889.15
  6. Step 6: Final answer
    x = 545,953.51

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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.