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Finding the Fourth Proportional to 714,211.85, 985,609.56 and 391,927.32

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Solution

The fourth proportional to 714,211.85, 985,609.56 and 391,927.32 is: 540,858.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,211.85 : 985,609.56 = 391,927.32 : x
  2. Step 2: Convert to fraction form
    714,211.85/985,609.56 = 391,927.32/x
  3. Step 3: Cross multiply
    714,211.85x = 985,609.56 × 391,927.32
  4. Step 4: Simplify right side
    714,211.85x = 386,287,313,417.18
  5. Step 5: Solve for x
    x = 386,287,313,417.18/714,211.85
  6. Step 6: Final answer
    x = 540,858.17

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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.