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Finding the Fourth Proportional to 659,906.70, 989,860.05 and 585,111.30

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Solution

The fourth proportional to 659,906.70, 989,860.05 and 585,111.30 is: 877,666.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,906.70 : 989,860.05 = 585,111.30 : x
  2. Step 2: Convert to fraction form
    659,906.70/989,860.05 = 585,111.30/x
  3. Step 3: Cross multiply
    659,906.70x = 989,860.05 × 585,111.30
  4. Step 4: Simplify right side
    659,906.70x = 579,178,300,673.57
  5. Step 5: Solve for x
    x = 579,178,300,673.57/659,906.70
  6. Step 6: Final answer
    x = 877,666.95

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.