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Finding the Fourth Proportional to 1,705,680, 2,354,045.76 and 990,288

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Solution

The fourth proportional to 1,705,680, 2,354,045.76 and 990,288 is: 1,366,717.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,705,680 : 2,354,045.76 = 990,288 : x
  2. Step 2: Convert to fraction form
    1,705,680/2,354,045.76 = 990,288/x
  3. Step 3: Cross multiply
    1,705,680x = 2,354,045.76 × 990,288
  4. Step 4: Simplify right side
    1,705,680x = 2,331,183,267,578.88
  5. Step 5: Solve for x
    x = 2,331,183,267,578.88/1,705,680
  6. Step 6: Final answer
    x = 1,366,717.83

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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.