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Finding the Fourth Proportional to 684,858.34, 945,081.68 and 378,935.31

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Solution

The fourth proportional to 684,858.34, 945,081.68 and 378,935.31 is: 522,918.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,858.34 : 945,081.68 = 378,935.31 : x
  2. Step 2: Convert to fraction form
    684,858.34/945,081.68 = 378,935.31/x
  3. Step 3: Cross multiply
    684,858.34x = 945,081.68 × 378,935.31
  4. Step 4: Simplify right side
    684,858.34x = 358,124,821,035.50
  5. Step 5: Solve for x
    x = 358,124,821,035.50/684,858.34
  6. Step 6: Final answer
    x = 522,918.10

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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.