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Finding the Fourth Proportional to 717,469.62, 990,021.92 and 411,530.20

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Solution

The fourth proportional to 717,469.62, 990,021.92 and 411,530.20 is: 567,862.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,469.62 : 990,021.92 = 411,530.20 : x
  2. Step 2: Convert to fraction form
    717,469.62/990,021.92 = 411,530.20/x
  3. Step 3: Cross multiply
    717,469.62x = 990,021.92 × 411,530.20
  4. Step 4: Simplify right side
    717,469.62x = 407,423,918,741.98
  5. Step 5: Solve for x
    x = 407,423,918,741.98/717,469.62
  6. Step 6: Final answer
    x = 567,862.26

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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.