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Finding the Fourth Proportional to 347,030.60, 520,286.70 and 147,187.40

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Solution

The fourth proportional to 347,030.60, 520,286.70 and 147,187.40 is: 220,671.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,030.60 : 520,286.70 = 147,187.40 : x
  2. Step 2: Convert to fraction form
    347,030.60/520,286.70 = 147,187.40/x
  3. Step 3: Cross multiply
    347,030.60x = 520,286.70 × 147,187.40
  4. Step 4: Simplify right side
    347,030.60x = 76,579,646,627.58
  5. Step 5: Solve for x
    x = 76,579,646,627.58/347,030.60
  6. Step 6: Final answer
    x = 220,671.16

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1.5x scale

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.