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Finding the Fourth Proportional to 298,963.40, 448,445.10 and 287,153.60

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Solution

The fourth proportional to 298,963.40, 448,445.10 and 287,153.60 is: 430,730.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,963.40 : 448,445.10 = 287,153.60 : x
  2. Step 2: Convert to fraction form
    298,963.40/448,445.10 = 287,153.60/x
  3. Step 3: Cross multiply
    298,963.40x = 448,445.10 × 287,153.60
  4. Step 4: Simplify right side
    298,963.40x = 128,772,624,867.36
  5. Step 5: Solve for x
    x = 128,772,624,867.36/298,963.40
  6. Step 6: Final answer
    x = 430,730.40

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1.5x scale

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.