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Finding the Fourth Proportional to 640,304.32, 883,515.05 and 378,623.33

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Solution

The fourth proportional to 640,304.32, 883,515.05 and 378,623.33 is: 522,438.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,304.32 : 883,515.05 = 378,623.33 : x
  2. Step 2: Convert to fraction form
    640,304.32/883,515.05 = 378,623.33/x
  3. Step 3: Cross multiply
    640,304.32x = 883,515.05 × 378,623.33
  4. Step 4: Simplify right side
    640,304.32x = 334,519,405,918.54
  5. Step 5: Solve for x
    x = 334,519,405,918.54/640,304.32
  6. Step 6: Final answer
    x = 522,438.16

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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.