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Finding the Fourth Proportional to 639,855.40, 883,052.67 and 368,011.30

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Solution

The fourth proportional to 639,855.40, 883,052.67 and 368,011.30 is: 507,885.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,855.40 : 883,052.67 = 368,011.30 : x
  2. Step 2: Convert to fraction form
    639,855.40/883,052.67 = 368,011.30/x
  3. Step 3: Cross multiply
    639,855.40x = 883,052.67 × 368,011.30
  4. Step 4: Simplify right side
    639,855.40x = 324,973,361,055.17
  5. Step 5: Solve for x
    x = 324,973,361,055.17/639,855.40
  6. Step 6: Final answer
    x = 507,885.63

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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.