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Finding the Fourth Proportional to 409,648.78, 614,050.95 and 156,860.20

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Solution

The fourth proportional to 409,648.78, 614,050.95 and 156,860.20 is: 235,128.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,648.78 : 614,050.95 = 156,860.20 : x
  2. Step 2: Convert to fraction form
    409,648.78/614,050.95 = 156,860.20/x
  3. Step 3: Cross multiply
    409,648.78x = 614,050.95 × 156,860.20
  4. Step 4: Simplify right side
    409,648.78x = 96,320,154,827.19
  5. Step 5: Solve for x
    x = 96,320,154,827.19/409,648.78
  6. Step 6: Final answer
    x = 235,128.63

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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.