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Finding the Fourth Proportional to 1,787,690.68, 2,467,061.76 and 971,949.28

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Solution

The fourth proportional to 1,787,690.68, 2,467,061.76 and 971,949.28 is: 1,341,316.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,787,690.68 : 2,467,061.76 = 971,949.28 : x
  2. Step 2: Convert to fraction form
    1,787,690.68/2,467,061.76 = 971,949.28/x
  3. Step 3: Cross multiply
    1,787,690.68x = 2,467,061.76 × 971,949.28
  4. Step 4: Simplify right side
    1,787,690.68x = 2,397,858,901,347.53
  5. Step 5: Solve for x
    x = 2,397,858,901,347.53/1,787,690.68
  6. Step 6: Final answer
    x = 1,341,316.44

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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.