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Finding the Fourth Proportional to 316,445.05, 436,690.47 and 171,247.47

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Solution

The fourth proportional to 316,445.05, 436,690.47 and 171,247.47 is: 236,319.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,445.05 : 436,690.47 = 171,247.47 : x
  2. Step 2: Convert to fraction form
    316,445.05/436,690.47 = 171,247.47/x
  3. Step 3: Cross multiply
    316,445.05x = 436,690.47 × 171,247.47
  4. Step 4: Simplify right side
    316,445.05x = 74,782,135,977.16
  5. Step 5: Solve for x
    x = 74,782,135,977.16/316,445.05
  6. Step 6: Final answer
    x = 236,319.50

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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.