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Finding the Fourth Proportional to 340,672.20, 511,008.30 and 315,011.40

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Solution

The fourth proportional to 340,672.20, 511,008.30 and 315,011.40 is: 472,517.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,672.20 : 511,008.30 = 315,011.40 : x
  2. Step 2: Convert to fraction form
    340,672.20/511,008.30 = 315,011.40/x
  3. Step 3: Cross multiply
    340,672.20x = 511,008.30 × 315,011.40
  4. Step 4: Simplify right side
    340,672.20x = 160,973,439,994.62
  5. Step 5: Solve for x
    x = 160,973,439,994.62/340,672.20
  6. Step 6: Final answer
    x = 472,517.10

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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.