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Finding the Fourth Proportional to 1,423,746.43, 1,964,743.80 and 779,153.69

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Solution

The fourth proportional to 1,423,746.43, 1,964,743.80 and 779,153.69 is: 1,075,217.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,423,746.43 : 1,964,743.80 = 779,153.69 : x
  2. Step 2: Convert to fraction form
    1,423,746.43/1,964,743.80 = 779,153.69/x
  3. Step 3: Cross multiply
    1,423,746.43x = 1,964,743.80 × 779,153.69
  4. Step 4: Simplify right side
    1,423,746.43x = 1,530,837,381,674.62
  5. Step 5: Solve for x
    x = 1,530,837,381,674.62/1,423,746.43
  6. Step 6: Final answer
    x = 1,075,217.71

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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.