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Finding the Fourth Proportional to 684,876.94, 945,111.99 and 378,945.34

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Solution

The fourth proportional to 684,876.94, 945,111.99 and 378,945.34 is: 522,934.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,876.94 : 945,111.99 = 378,945.34 : x
  2. Step 2: Convert to fraction form
    684,876.94/945,111.99 = 378,945.34/x
  3. Step 3: Cross multiply
    684,876.94x = 945,111.99 × 378,945.34
  4. Step 4: Simplify right side
    684,876.94x = 358,145,784,388.63
  5. Step 5: Solve for x
    x = 358,145,784,388.63/684,876.94
  6. Step 6: Final answer
    x = 522,934.51

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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.