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Finding the Fourth Proportional to 393,543.90, 590,319.36 and 113,061.06

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Solution

The fourth proportional to 393,543.90, 590,319.36 and 113,061.06 is: 169,592.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,543.90 : 590,319.36 = 113,061.06 : x
  2. Step 2: Convert to fraction form
    393,543.90/590,319.36 = 113,061.06/x
  3. Step 3: Cross multiply
    393,543.90x = 590,319.36 × 113,061.06
  4. Step 4: Simplify right side
    393,543.90x = 66,742,132,580.12
  5. Step 5: Solve for x
    x = 66,742,132,580.12/393,543.90
  6. Step 6: Final answer
    x = 169,592.60

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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.