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Finding the Fourth Proportional to 318,417.84, 439,171.56 and 197,630.64

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Solution

The fourth proportional to 318,417.84, 439,171.56 and 197,630.64 is: 272,578.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,417.84 : 439,171.56 = 197,630.64 : x
  2. Step 2: Convert to fraction form
    318,417.84/439,171.56 = 197,630.64/x
  3. Step 3: Cross multiply
    318,417.84x = 439,171.56 × 197,630.64
  4. Step 4: Simplify right side
    318,417.84x = 86,793,756,472.60
  5. Step 5: Solve for x
    x = 86,793,756,472.60/318,417.84
  6. Step 6: Final answer
    x = 272,578.18

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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.