Home / 684,923.92-945,428.36-398,684.56

Finding the Fourth Proportional to 684,923.92, 945,428.36 and 398,684.56

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Solution

The fourth proportional to 684,923.92, 945,428.36 and 398,684.56 is: 550,320.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,923.92 : 945,428.36 = 398,684.56 : x
  2. Step 2: Convert to fraction form
    684,923.92/945,428.36 = 398,684.56/x
  3. Step 3: Cross multiply
    684,923.92x = 945,428.36 × 398,684.56
  4. Step 4: Simplify right side
    684,923.92x = 376,927,689,718.12
  5. Step 5: Solve for x
    x = 376,927,689,718.12/684,923.92
  6. Step 6: Final answer
    x = 550,320.52

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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.