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Finding the Fourth Proportional to 699,678.87, 965,545.68 and 389,578.47

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Solution

The fourth proportional to 699,678.87, 965,545.68 and 389,578.47 is: 537,612.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,678.87 : 965,545.68 = 389,578.47 : x
  2. Step 2: Convert to fraction form
    699,678.87/965,545.68 = 389,578.47/x
  3. Step 3: Cross multiply
    699,678.87x = 965,545.68 × 389,578.47
  4. Step 4: Simplify right side
    699,678.87x = 376,155,808,729.51
  5. Step 5: Solve for x
    x = 376,155,808,729.51/699,678.87
  6. Step 6: Final answer
    x = 537,612.07

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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.