Home / 345,378.72-518,421.48-285,215.58

Finding the Fourth Proportional to 345,378.72, 518,421.48 and 285,215.58

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Solution

The fourth proportional to 345,378.72, 518,421.48 and 285,215.58 is: 428,115.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,378.72 : 518,421.48 = 285,215.58 : x
  2. Step 2: Convert to fraction form
    345,378.72/518,421.48 = 285,215.58/x
  3. Step 3: Cross multiply
    345,378.72x = 518,421.48 × 285,215.58
  4. Step 4: Simplify right side
    345,378.72x = 147,861,883,102.66
  5. Step 5: Solve for x
    x = 147,861,883,102.66/345,378.72
  6. Step 6: Final answer
    x = 428,115.21

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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.