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Finding the Fourth Proportional to 619,705.86, 854,974.76 and 404,970.42

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Solution

The fourth proportional to 619,705.86, 854,974.76 and 404,970.42 is: 558,715.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,705.86 : 854,974.76 = 404,970.42 : x
  2. Step 2: Convert to fraction form
    619,705.86/854,974.76 = 404,970.42/x
  3. Step 3: Cross multiply
    619,705.86x = 854,974.76 × 404,970.42
  4. Step 4: Simplify right side
    619,705.86x = 346,239,487,646.60
  5. Step 5: Solve for x
    x = 346,239,487,646.60/619,705.86
  6. Step 6: Final answer
    x = 558,715.85

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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.