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Finding the Fourth Proportional to 717,068.20, 989,516.56 and 394,715.34

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Solution

The fourth proportional to 717,068.20, 989,516.56 and 394,715.34 is: 544,686.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,068.20 : 989,516.56 = 394,715.34 : x
  2. Step 2: Convert to fraction form
    717,068.20/989,516.56 = 394,715.34/x
  3. Step 3: Cross multiply
    717,068.20x = 989,516.56 × 394,715.34
  4. Step 4: Simplify right side
    717,068.20x = 390,577,365,416.03
  5. Step 5: Solve for x
    x = 390,577,365,416.03/717,068.20
  6. Step 6: Final answer
    x = 544,686.50

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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.