Home / 345,841.20-518,761.80-212,288.40

Finding the Fourth Proportional to 345,841.20, 518,761.80 and 212,288.40

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Solution

The fourth proportional to 345,841.20, 518,761.80 and 212,288.40 is: 318,432.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,841.20 : 518,761.80 = 212,288.40 : x
  2. Step 2: Convert to fraction form
    345,841.20/518,761.80 = 212,288.40/x
  3. Step 3: Cross multiply
    345,841.20x = 518,761.80 × 212,288.40
  4. Step 4: Simplify right side
    345,841.20x = 110,127,112,503.12
  5. Step 5: Solve for x
    x = 110,127,112,503.12/345,841.20
  6. Step 6: Final answer
    x = 318,432.60

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1.5x scale

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.