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Finding the Fourth Proportional to 298,979.60, 448,469.40 and 287,315.60

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Solution

The fourth proportional to 298,979.60, 448,469.40 and 287,315.60 is: 430,973.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,979.60 : 448,469.40 = 287,315.60 : x
  2. Step 2: Convert to fraction form
    298,979.60/448,469.40 = 287,315.60/x
  3. Step 3: Cross multiply
    298,979.60x = 448,469.40 × 287,315.60
  4. Step 4: Simplify right side
    298,979.60x = 128,852,254,742.64
  5. Step 5: Solve for x
    x = 128,852,254,742.64/298,979.60
  6. Step 6: Final answer
    x = 430,973.40

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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.