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Finding the Fourth Proportional to 280,487.08, 387,072.12 and 153,162.80

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Solution

The fourth proportional to 280,487.08, 387,072.12 and 153,162.80 is: 211,364.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,487.08 : 387,072.12 = 153,162.80 : x
  2. Step 2: Convert to fraction form
    280,487.08/387,072.12 = 153,162.80/x
  3. Step 3: Cross multiply
    280,487.08x = 387,072.12 × 153,162.80
  4. Step 4: Simplify right side
    280,487.08x = 59,285,049,701.14
  5. Step 5: Solve for x
    x = 59,285,049,701.14/280,487.08
  6. Step 6: Final answer
    x = 211,364.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.