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Finding the Fourth Proportional to 639,429.59, 958,791.74 and 260,253

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Solution

The fourth proportional to 639,429.59, 958,791.74 and 260,253 is: 390,235.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,429.59 : 958,791.74 = 260,253 : x
  2. Step 2: Convert to fraction form
    639,429.59/958,791.74 = 260,253/x
  3. Step 3: Cross multiply
    639,429.59x = 958,791.74 × 260,253
  4. Step 4: Simplify right side
    639,429.59x = 249,528,425,408.96
  5. Step 5: Solve for x
    x = 249,528,425,408.96/639,429.59
  6. Step 6: Final answer
    x = 390,235.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.