Home / 280,670.72-387,321.04-153,343.56

Finding the Fourth Proportional to 280,670.72, 387,321.04 and 153,343.56

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Solution

The fourth proportional to 280,670.72, 387,321.04 and 153,343.56 is: 211,611.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,670.72 : 387,321.04 = 153,343.56 : x
  2. Step 2: Convert to fraction form
    280,670.72/387,321.04 = 153,343.56/x
  3. Step 3: Cross multiply
    280,670.72x = 387,321.04 × 153,343.56
  4. Step 4: Simplify right side
    280,670.72x = 59,393,187,136.50
  5. Step 5: Solve for x
    x = 59,393,187,136.50/280,670.72
  6. Step 6: Final answer
    x = 211,611.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.