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Finding the Fourth Proportional to 1,438,609, 1,985,280.42 and 802,705

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Solution

The fourth proportional to 1,438,609, 1,985,280.42 and 802,705 is: 1,107,732.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,438,609 : 1,985,280.42 = 802,705 : x
  2. Step 2: Convert to fraction form
    1,438,609/1,985,280.42 = 802,705/x
  3. Step 3: Cross multiply
    1,438,609x = 1,985,280.42 × 802,705
  4. Step 4: Simplify right side
    1,438,609x = 1,593,594,519,536.10
  5. Step 5: Solve for x
    x = 1,593,594,519,536.10/1,438,609
  6. Step 6: Final answer
    x = 1,107,732.90

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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.