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Finding the Fourth Proportional to 487,654.80, 730,056.60 and 347,686.80

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Solution

The fourth proportional to 487,654.80, 730,056.60 and 347,686.80 is: 520,513.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,654.80 : 730,056.60 = 347,686.80 : x
  2. Step 2: Convert to fraction form
    487,654.80/730,056.60 = 347,686.80/x
  3. Step 3: Cross multiply
    487,654.80x = 730,056.60 × 347,686.80
  4. Step 4: Simplify right side
    487,654.80x = 253,831,043,072.88
  5. Step 5: Solve for x
    x = 253,831,043,072.88/487,654.80
  6. Step 6: Final answer
    x = 520,513.78

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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.