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Finding the Fourth Proportional to 639,603.42, 882,654.03 and 353,124.06

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Solution

The fourth proportional to 639,603.42, 882,654.03 and 353,124.06 is: 487,311.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,603.42 : 882,654.03 = 353,124.06 : x
  2. Step 2: Convert to fraction form
    639,603.42/882,654.03 = 353,124.06/x
  3. Step 3: Cross multiply
    639,603.42x = 882,654.03 × 353,124.06
  4. Step 4: Simplify right side
    639,603.42x = 311,686,374,648.96
  5. Step 5: Solve for x
    x = 311,686,374,648.96/639,603.42
  6. Step 6: Final answer
    x = 487,311.93

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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.