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Finding the Fourth Proportional to 714,224.67, 985,590.78 and 391,909.32

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Solution

The fourth proportional to 714,224.67, 985,590.78 and 391,909.32 is: 540,813.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,224.67 : 985,590.78 = 391,909.32 : x
  2. Step 2: Convert to fraction form
    714,224.67/985,590.78 = 391,909.32/x
  3. Step 3: Cross multiply
    714,224.67x = 985,590.78 × 391,909.32
  4. Step 4: Simplify right side
    714,224.67x = 386,262,212,388.07
  5. Step 5: Solve for x
    x = 386,262,212,388.07/714,224.67
  6. Step 6: Final answer
    x = 540,813.32

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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.