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Finding the Fourth Proportional to 656,514.92, 905,990.76 and 354,708.92

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Solution

The fourth proportional to 656,514.92, 905,990.76 and 354,708.92 is: 489,498.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,514.92 : 905,990.76 = 354,708.92 : x
  2. Step 2: Convert to fraction form
    656,514.92/905,990.76 = 354,708.92/x
  3. Step 3: Cross multiply
    656,514.92x = 905,990.76 × 354,708.92
  4. Step 4: Simplify right side
    656,514.92x = 321,363,004,009.58
  5. Step 5: Solve for x
    x = 321,363,004,009.58/656,514.92
  6. Step 6: Final answer
    x = 489,498.40

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Double scale
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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.