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Finding the Fourth Proportional to 678,605.19, 936,838.74 and 523,217.10

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Solution

The fourth proportional to 678,605.19, 936,838.74 and 523,217.10 is: 722,319.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,605.19 : 936,838.74 = 523,217.10 : x
  2. Step 2: Convert to fraction form
    678,605.19/936,838.74 = 523,217.10/x
  3. Step 3: Cross multiply
    678,605.19x = 936,838.74 × 523,217.10
  4. Step 4: Simplify right side
    678,605.19x = 490,170,046,094.37
  5. Step 5: Solve for x
    x = 490,170,046,094.37/678,605.19
  6. Step 6: Final answer
    x = 722,319.92

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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.