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Finding the Fourth Proportional to 343,291.20, 515,090.40 and 156,206.40

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Solution

The fourth proportional to 343,291.20, 515,090.40 and 156,206.40 is: 234,379.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,291.20 : 515,090.40 = 156,206.40 : x
  2. Step 2: Convert to fraction form
    343,291.20/515,090.40 = 156,206.40/x
  3. Step 3: Cross multiply
    343,291.20x = 515,090.40 × 156,206.40
  4. Step 4: Simplify right side
    343,291.20x = 80,460,417,058.56
  5. Step 5: Solve for x
    x = 80,460,417,058.56/343,291.20
  6. Step 6: Final answer
    x = 234,379.49

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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.