Home / 689,621.70-951,663.18-399,245.51

Finding the Fourth Proportional to 689,621.70, 951,663.18 and 399,245.51

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Solution

The fourth proportional to 689,621.70, 951,663.18 and 399,245.51 is: 550,950.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,621.70 : 951,663.18 = 399,245.51 : x
  2. Step 2: Convert to fraction form
    689,621.70/951,663.18 = 399,245.51/x
  3. Step 3: Cross multiply
    689,621.70x = 951,663.18 × 399,245.51
  4. Step 4: Simplify right side
    689,621.70x = 379,947,247,924.79
  5. Step 5: Solve for x
    x = 379,947,247,924.79/689,621.70
  6. Step 6: Final answer
    x = 550,950.25

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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.