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Finding the Fourth Proportional to 418,712.13, 577,636.23 and 279,042.12

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Solution

The fourth proportional to 418,712.13, 577,636.23 and 279,042.12 is: 384,953.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,712.13 : 577,636.23 = 279,042.12 : x
  2. Step 2: Convert to fraction form
    418,712.13/577,636.23 = 279,042.12/x
  3. Step 3: Cross multiply
    418,712.13x = 577,636.23 × 279,042.12
  4. Step 4: Simplify right side
    418,712.13x = 161,184,838,208.01
  5. Step 5: Solve for x
    x = 161,184,838,208.01/418,712.13
  6. Step 6: Final answer
    x = 384,953.83

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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.