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Finding the Fourth Proportional to 280,485.16, 420,880.82 and 162,387.16

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Solution

The fourth proportional to 280,485.16, 420,880.82 and 162,387.16 is: 243,669.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,485.16 : 420,880.82 = 162,387.16 : x
  2. Step 2: Convert to fraction form
    280,485.16/420,880.82 = 162,387.16/x
  3. Step 3: Cross multiply
    280,485.16x = 420,880.82 × 162,387.16
  4. Step 4: Simplify right side
    280,485.16x = 68,345,641,058.27
  5. Step 5: Solve for x
    x = 68,345,641,058.27/280,485.16
  6. Step 6: Final answer
    x = 243,669.37

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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.