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Finding the Fourth Proportional to 660,576.58, 911,597.45 and 388,654.72

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Solution

The fourth proportional to 660,576.58, 911,597.45 and 388,654.72 is: 536,344.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,576.58 : 911,597.45 = 388,654.72 : x
  2. Step 2: Convert to fraction form
    660,576.58/911,597.45 = 388,654.72/x
  3. Step 3: Cross multiply
    660,576.58x = 911,597.45 × 388,654.72
  4. Step 4: Simplify right side
    660,576.58x = 354,296,649,739.19
  5. Step 5: Solve for x
    x = 354,296,649,739.19/660,576.58
  6. Step 6: Final answer
    x = 536,344.55

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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.