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Finding the Fourth Proportional to 922,911.70, 1,384,367.55 and 686,715.70

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Solution

The fourth proportional to 922,911.70, 1,384,367.55 and 686,715.70 is: 1,030,073.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    922,911.70 : 1,384,367.55 = 686,715.70 : x
  2. Step 2: Convert to fraction form
    922,911.70/1,384,367.55 = 686,715.70/x
  3. Step 3: Cross multiply
    922,911.70x = 1,384,367.55 × 686,715.70
  4. Step 4: Simplify right side
    922,911.70x = 950,666,931,155.54
  5. Step 5: Solve for x
    x = 950,666,931,155.54/922,911.70
  6. Step 6: Final answer
    x = 1,030,073.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.