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Finding the Fourth Proportional to 663,322.20, 915,388.08 and 376,858.32

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Solution

The fourth proportional to 663,322.20, 915,388.08 and 376,858.32 is: 520,066.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,322.20 : 915,388.08 = 376,858.32 : x
  2. Step 2: Convert to fraction form
    663,322.20/915,388.08 = 376,858.32/x
  3. Step 3: Cross multiply
    663,322.20x = 915,388.08 × 376,858.32
  4. Step 4: Simplify right side
    663,322.20x = 344,971,613,976.83
  5. Step 5: Solve for x
    x = 344,971,613,976.83/663,322.20
  6. Step 6: Final answer
    x = 520,066.44

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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.