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Finding the Fourth Proportional to 978,107.10, 1,467,233.55 and 346,938.90

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Solution

The fourth proportional to 978,107.10, 1,467,233.55 and 346,938.90 is: 520,434.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,107.10 : 1,467,233.55 = 346,938.90 : x
  2. Step 2: Convert to fraction form
    978,107.10/1,467,233.55 = 346,938.90/x
  3. Step 3: Cross multiply
    978,107.10x = 1,467,233.55 × 346,938.90
  4. Step 4: Simplify right side
    978,107.10x = 509,040,393,880.10
  5. Step 5: Solve for x
    x = 509,040,393,880.10/978,107.10
  6. Step 6: Final answer
    x = 520,434.21

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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.