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Finding the Fourth Proportional to 488,405.61, 673,629.11 and 427,871.16

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Solution

The fourth proportional to 488,405.61, 673,629.11 and 427,871.16 is: 590,137.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,405.61 : 673,629.11 = 427,871.16 : x
  2. Step 2: Convert to fraction form
    488,405.61/673,629.11 = 427,871.16/x
  3. Step 3: Cross multiply
    488,405.61x = 673,629.11 × 427,871.16
  4. Step 4: Simplify right side
    488,405.61x = 288,226,468,170.63
  5. Step 5: Solve for x
    x = 288,226,468,170.63/488,405.61
  6. Step 6: Final answer
    x = 590,137.50

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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.