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Finding the Fourth Proportional to 1,209,891.80, 1,669,671.95 and 658,623.38

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Solution

The fourth proportional to 1,209,891.80, 1,669,671.95 and 658,623.38 is: 908,911.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,891.80 : 1,669,671.95 = 658,623.38 : x
  2. Step 2: Convert to fraction form
    1,209,891.80/1,669,671.95 = 658,623.38/x
  3. Step 3: Cross multiply
    1,209,891.80x = 1,669,671.95 × 658,623.38
  4. Step 4: Simplify right side
    1,209,891.80x = 1,099,684,971,558.71
  5. Step 5: Solve for x
    x = 1,099,684,971,558.71/1,209,891.80
  6. Step 6: Final answer
    x = 908,911.83

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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.