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Finding the Fourth Proportional to 717,338.80, 989,564.34 and 445,567.60

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Solution

The fourth proportional to 717,338.80, 989,564.34 and 445,567.60 is: 614,657.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,338.80 : 989,564.34 = 445,567.60 : x
  2. Step 2: Convert to fraction form
    717,338.80/989,564.34 = 445,567.60/x
  3. Step 3: Cross multiply
    717,338.80x = 989,564.34 × 445,567.60
  4. Step 4: Simplify right side
    717,338.80x = 440,917,808,019.38
  5. Step 5: Solve for x
    x = 440,917,808,019.38/717,338.80
  6. Step 6: Final answer
    x = 614,657.69

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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.