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Finding the Fourth Proportional to 717,427.56, 990,056.61 and 395,138.82

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Solution

The fourth proportional to 717,427.56, 990,056.61 and 395,138.82 is: 545,295.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,427.56 : 990,056.61 = 395,138.82 : x
  2. Step 2: Convert to fraction form
    717,427.56/990,056.61 = 395,138.82/x
  3. Step 3: Cross multiply
    717,427.56x = 990,056.61 × 395,138.82
  4. Step 4: Simplify right side
    717,427.56x = 391,209,800,608.60
  5. Step 5: Solve for x
    x = 391,209,800,608.60/717,427.56
  6. Step 6: Final answer
    x = 545,295.19

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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.