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Finding the Fourth Proportional to 859,887.67, 1,290,014.99 and 291,248.86

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Solution

The fourth proportional to 859,887.67, 1,290,014.99 and 291,248.86 is: 436,935.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,887.67 : 1,290,014.99 = 291,248.86 : x
  2. Step 2: Convert to fraction form
    859,887.67/1,290,014.99 = 291,248.86/x
  3. Step 3: Cross multiply
    859,887.67x = 1,290,014.99 × 291,248.86
  4. Step 4: Simplify right side
    859,887.67x = 375,715,395,220.41
  5. Step 5: Solve for x
    x = 375,715,395,220.41/859,887.67
  6. Step 6: Final answer
    x = 436,935.44

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Double scale
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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.