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Finding the Fourth Proportional to 247,279.80, 370,482.30 and 212,287.80

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Solution

The fourth proportional to 247,279.80, 370,482.30 and 212,287.80 is: 318,056.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,279.80 : 370,482.30 = 212,287.80 : x
  2. Step 2: Convert to fraction form
    247,279.80/370,482.30 = 212,287.80/x
  3. Step 3: Cross multiply
    247,279.80x = 370,482.30 × 212,287.80
  4. Step 4: Simplify right side
    247,279.80x = 78,648,872,405.94
  5. Step 5: Solve for x
    x = 78,648,872,405.94/247,279.80
  6. Step 6: Final answer
    x = 318,056.20

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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.