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Finding the Fourth Proportional to 370,287.20, 555,430.80 and 212,823.20

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Solution

The fourth proportional to 370,287.20, 555,430.80 and 212,823.20 is: 319,234.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    370,287.20 : 555,430.80 = 212,823.20 : x
  2. Step 2: Convert to fraction form
    370,287.20/555,430.80 = 212,823.20/x
  3. Step 3: Cross multiply
    370,287.20x = 555,430.80 × 212,823.20
  4. Step 4: Simplify right side
    370,287.20x = 118,208,560,234.56
  5. Step 5: Solve for x
    x = 118,208,560,234.56/370,287.20
  6. Step 6: Final answer
    x = 319,234.80

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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.