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Finding the Fourth Proportional to 873,609.40, 1,310,414.10 and 518,440.60

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Solution

The fourth proportional to 873,609.40, 1,310,414.10 and 518,440.60 is: 777,660.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    873,609.40 : 1,310,414.10 = 518,440.60 : x
  2. Step 2: Convert to fraction form
    873,609.40/1,310,414.10 = 518,440.60/x
  3. Step 3: Cross multiply
    873,609.40x = 1,310,414.10 × 518,440.60
  4. Step 4: Simplify right side
    873,609.40x = 679,371,872,252.46
  5. Step 5: Solve for x
    x = 679,371,872,252.46/873,609.40
  6. Step 6: Final answer
    x = 777,660.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.