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Finding the Fourth Proportional to 545,140.80, 817,419.60 and 190,166.40

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Solution

The fourth proportional to 545,140.80, 817,419.60 and 190,166.40 is: 285,147.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,140.80 : 817,419.60 = 190,166.40 : x
  2. Step 2: Convert to fraction form
    545,140.80/817,419.60 = 190,166.40/x
  3. Step 3: Cross multiply
    545,140.80x = 817,419.60 × 190,166.40
  4. Step 4: Simplify right side
    545,140.80x = 155,445,742,621.44
  5. Step 5: Solve for x
    x = 155,445,742,621.44/545,140.80
  6. Step 6: Final answer
    x = 285,147.88

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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.