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Finding the Fourth Proportional to 280,469.82, 387,048.83 and 153,142.70

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Solution

The fourth proportional to 280,469.82, 387,048.83 and 153,142.70 is: 211,337.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,469.82 : 387,048.83 = 153,142.70 : x
  2. Step 2: Convert to fraction form
    280,469.82/387,048.83 = 153,142.70/x
  3. Step 3: Cross multiply
    280,469.82x = 387,048.83 × 153,142.70
  4. Step 4: Simplify right side
    280,469.82x = 59,273,702,858.04
  5. Step 5: Solve for x
    x = 59,273,702,858.04/280,469.82
  6. Step 6: Final answer
    x = 211,337.19

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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.