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Finding the Fourth Proportional to 879,662.90, 1,318,903.05 and 346,909.70

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Solution

The fourth proportional to 879,662.90, 1,318,903.05 and 346,909.70 is: 520,131.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,662.90 : 1,318,903.05 = 346,909.70 : x
  2. Step 2: Convert to fraction form
    879,662.90/1,318,903.05 = 346,909.70/x
  3. Step 3: Cross multiply
    879,662.90x = 1,318,903.05 × 346,909.70
  4. Step 4: Simplify right side
    879,662.90x = 457,540,261,404.59
  5. Step 5: Solve for x
    x = 457,540,261,404.59/879,662.90
  6. Step 6: Final answer
    x = 520,131.36

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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.