Home / 345,868.20-518,802.30-212,315.40

Finding the Fourth Proportional to 345,868.20, 518,802.30 and 212,315.40

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Solution

The fourth proportional to 345,868.20, 518,802.30 and 212,315.40 is: 318,473.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,868.20 : 518,802.30 = 212,315.40 : x
  2. Step 2: Convert to fraction form
    345,868.20/518,802.30 = 212,315.40/x
  3. Step 3: Cross multiply
    345,868.20x = 518,802.30 × 212,315.40
  4. Step 4: Simplify right side
    345,868.20x = 110,149,717,845.42
  5. Step 5: Solve for x
    x = 110,149,717,845.42/345,868.20
  6. Step 6: Final answer
    x = 318,473.10

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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.