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Finding the Fourth Proportional to 518,077.56, 714,959.04 and 288,650.08

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Solution

The fourth proportional to 518,077.56, 714,959.04 and 288,650.08 is: 398,343.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,077.56 : 714,959.04 = 288,650.08 : x
  2. Step 2: Convert to fraction form
    518,077.56/714,959.04 = 288,650.08/x
  3. Step 3: Cross multiply
    518,077.56x = 714,959.04 × 288,650.08
  4. Step 4: Simplify right side
    518,077.56x = 206,372,984,092.72
  5. Step 5: Solve for x
    x = 206,372,984,092.72/518,077.56
  6. Step 6: Final answer
    x = 398,343.80

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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.