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Finding the Fourth Proportional to 299,421.60, 449,650.80 and 290,090.40

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Solution

The fourth proportional to 299,421.60, 449,650.80 and 290,090.40 is: 435,637.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,421.60 : 449,650.80 = 290,090.40 : x
  2. Step 2: Convert to fraction form
    299,421.60/449,650.80 = 290,090.40/x
  3. Step 3: Cross multiply
    299,421.60x = 449,650.80 × 290,090.40
  4. Step 4: Simplify right side
    299,421.60x = 130,439,380,432.32
  5. Step 5: Solve for x
    x = 130,439,380,432.32/299,421.60
  6. Step 6: Final answer
    x = 435,637.84

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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.