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Finding the Fourth Proportional to 709,783.77, 979,587.56 and 403,934.56

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Solution

The fourth proportional to 709,783.77, 979,587.56 and 403,934.56 is: 557,478.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,783.77 : 979,587.56 = 403,934.56 : x
  2. Step 2: Convert to fraction form
    709,783.77/979,587.56 = 403,934.56/x
  3. Step 3: Cross multiply
    709,783.77x = 979,587.56 × 403,934.56
  4. Step 4: Simplify right side
    709,783.77x = 395,689,268,590.94
  5. Step 5: Solve for x
    x = 395,689,268,590.94/709,783.77
  6. Step 6: Final answer
    x = 557,478.61

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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.