Home / 666,581.91-919,621.29-387,131.53

Finding the Fourth Proportional to 666,581.91, 919,621.29 and 387,131.53

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Solution

The fourth proportional to 666,581.91, 919,621.29 and 387,131.53 is: 534,089.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,581.91 : 919,621.29 = 387,131.53 : x
  2. Step 2: Convert to fraction form
    666,581.91/919,621.29 = 387,131.53/x
  3. Step 3: Cross multiply
    666,581.91x = 919,621.29 × 387,131.53
  4. Step 4: Simplify right side
    666,581.91x = 356,014,399,619.54
  5. Step 5: Solve for x
    x = 356,014,399,619.54/666,581.91
  6. Step 6: Final answer
    x = 534,089.50

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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.