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Finding the Fourth Proportional to 666,784.11, 920,154.96 and 360,853.80

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Solution

The fourth proportional to 666,784.11, 920,154.96 and 360,853.80 is: 497,974.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,784.11 : 920,154.96 = 360,853.80 : x
  2. Step 2: Convert to fraction form
    666,784.11/920,154.96 = 360,853.80/x
  3. Step 3: Cross multiply
    666,784.11x = 920,154.96 × 360,853.80
  4. Step 4: Simplify right side
    666,784.11x = 332,041,413,904.85
  5. Step 5: Solve for x
    x = 332,041,413,904.85/666,784.11
  6. Step 6: Final answer
    x = 497,974.40

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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.