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Finding the Fourth Proportional to 654,434.40, 903,279.84 and 399,998.88

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Solution

The fourth proportional to 654,434.40, 903,279.84 and 399,998.88 is: 552,096.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,434.40 : 903,279.84 = 399,998.88 : x
  2. Step 2: Convert to fraction form
    654,434.40/903,279.84 = 399,998.88/x
  3. Step 3: Cross multiply
    654,434.40x = 903,279.84 × 399,998.88
  4. Step 4: Simplify right side
    654,434.40x = 361,310,924,326.58
  5. Step 5: Solve for x
    x = 361,310,924,326.58/654,434.40
  6. Step 6: Final answer
    x = 552,096.47

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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.