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Finding the Fourth Proportional to 666,338.76, 999,507.36 and 217,058.91

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Solution

The fourth proportional to 666,338.76, 999,507.36 and 217,058.91 is: 325,588.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,338.76 : 999,507.36 = 217,058.91 : x
  2. Step 2: Convert to fraction form
    666,338.76/999,507.36 = 217,058.91/x
  3. Step 3: Cross multiply
    666,338.76x = 999,507.36 × 217,058.91
  4. Step 4: Simplify right side
    666,338.76x = 216,951,973,643.69
  5. Step 5: Solve for x
    x = 216,951,973,643.69/666,338.76
  6. Step 6: Final answer
    x = 325,588.11

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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.