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Finding the Fourth Proportional to 717,604, 990,293.52 and 399,652

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Solution

The fourth proportional to 717,604, 990,293.52 and 399,652 is: 551,519.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,604 : 990,293.52 = 399,652 : x
  2. Step 2: Convert to fraction form
    717,604/990,293.52 = 399,652/x
  3. Step 3: Cross multiply
    717,604x = 990,293.52 × 399,652
  4. Step 4: Simplify right side
    717,604x = 395,772,785,855.04
  5. Step 5: Solve for x
    x = 395,772,785,855.04/717,604
  6. Step 6: Final answer
    x = 551,519.76

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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.