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Finding the Fourth Proportional to 715,636.77, 987,528.15 and 393,367.74

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Solution

The fourth proportional to 715,636.77, 987,528.15 and 393,367.74 is: 542,819.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,636.77 : 987,528.15 = 393,367.74 : x
  2. Step 2: Convert to fraction form
    715,636.77/987,528.15 = 393,367.74/x
  3. Step 3: Cross multiply
    715,636.77x = 987,528.15 × 393,367.74
  4. Step 4: Simplify right side
    715,636.77x = 388,461,716,551.88
  5. Step 5: Solve for x
    x = 388,461,716,551.88/715,636.77
  6. Step 6: Final answer
    x = 542,819.67

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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.