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Finding the Fourth Proportional to 393,445.58, 542,954.93 and 223,679.71

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Solution

The fourth proportional to 393,445.58, 542,954.93 and 223,679.71 is: 308,678.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,445.58 : 542,954.93 = 223,679.71 : x
  2. Step 2: Convert to fraction form
    393,445.58/542,954.93 = 223,679.71/x
  3. Step 3: Cross multiply
    393,445.58x = 542,954.93 × 223,679.71
  4. Step 4: Simplify right side
    393,445.58x = 121,448,001,285.47
  5. Step 5: Solve for x
    x = 121,448,001,285.47/393,445.58
  6. Step 6: Final answer
    x = 308,678.02

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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.