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Finding the Fourth Proportional to 717,489.88, 990,049.76 and 411,550.45

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Solution

The fourth proportional to 717,489.88, 990,049.76 and 411,550.45 is: 567,890.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,489.88 : 990,049.76 = 411,550.45 : x
  2. Step 2: Convert to fraction form
    717,489.88/990,049.76 = 411,550.45/x
  3. Step 3: Cross multiply
    717,489.88x = 990,049.76 × 411,550.45
  4. Step 4: Simplify right side
    717,489.88x = 407,455,419,300.14
  5. Step 5: Solve for x
    x = 407,455,419,300.14/717,489.88
  6. Step 6: Final answer
    x = 567,890.13

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Double scale
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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.