Home / 717,143,961.23-989,632,538.29-399,587,799.59

Finding the Fourth Proportional to 717,143,961.23, 989,632,538.29 and 399,587,799.59

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Solution

The fourth proportional to 717,143,961.23, 989,632,538.29 and 399,587,799.59 is: 551,416,604.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,143,961.23 : 989,632,538.29 = 399,587,799.59 : x
  2. Step 2: Convert to fraction form
    717,143,961.23/989,632,538.29 = 399,587,799.59/x
  3. Step 3: Cross multiply
    717,143,961.23x = 989,632,538.29 × 399,587,799.59
  4. Step 4: Simplify right side
    717,143,961.23x = 395,445,088,377,967,488
  5. Step 5: Solve for x
    x = 395,445,088,377,967,488/717,143,961.23
  6. Step 6: Final answer
    x = 551,416,604.97

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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.