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Finding the Fourth Proportional to 299,129.40, 448,694.10 and 287,319.60

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Solution

The fourth proportional to 299,129.40, 448,694.10 and 287,319.60 is: 430,979.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,129.40 : 448,694.10 = 287,319.60 : x
  2. Step 2: Convert to fraction form
    299,129.40/448,694.10 = 287,319.60/x
  3. Step 3: Cross multiply
    299,129.40x = 448,694.10 × 287,319.60
  4. Step 4: Simplify right side
    299,129.40x = 128,918,609,334.36
  5. Step 5: Solve for x
    x = 128,918,609,334.36/299,129.40
  6. Step 6: Final answer
    x = 430,979.40

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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.