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Finding the Fourth Proportional to 621,330.72, 931,405.05 and 396,058.65

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Solution

The fourth proportional to 621,330.72, 931,405.05 and 396,058.65 is: 593,711.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,330.72 : 931,405.05 = 396,058.65 : x
  2. Step 2: Convert to fraction form
    621,330.72/931,405.05 = 396,058.65/x
  3. Step 3: Cross multiply
    621,330.72x = 931,405.05 × 396,058.65
  4. Step 4: Simplify right side
    621,330.72x = 368,891,026,706.18
  5. Step 5: Solve for x
    x = 368,891,026,706.18/621,330.72
  6. Step 6: Final answer
    x = 593,711.23

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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.