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Finding the Fourth Proportional to 717,949.80, 990,768.42 and 395,659.80

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Solution

The fourth proportional to 717,949.80, 990,768.42 and 395,659.80 is: 546,009.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,949.80 : 990,768.42 = 395,659.80 : x
  2. Step 2: Convert to fraction form
    717,949.80/990,768.42 = 395,659.80/x
  3. Step 3: Cross multiply
    717,949.80x = 990,768.42 × 395,659.80
  4. Step 4: Simplify right side
    717,949.80x = 392,007,234,903.52
  5. Step 5: Solve for x
    x = 392,007,234,903.52/717,949.80
  6. Step 6: Final answer
    x = 546,009.25

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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.