Home / 280,450.50-387,021.47-153,126.08

Finding the Fourth Proportional to 280,450.50, 387,021.47 and 153,126.08

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Solution

The fourth proportional to 280,450.50, 387,021.47 and 153,126.08 is: 211,313.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,450.50 : 387,021.47 = 153,126.08 : x
  2. Step 2: Convert to fraction form
    280,450.50/387,021.47 = 153,126.08/x
  3. Step 3: Cross multiply
    280,450.50x = 387,021.47 × 153,126.08
  4. Step 4: Simplify right side
    280,450.50x = 59,263,080,576.94
  5. Step 5: Solve for x
    x = 59,263,080,576.94/280,450.50
  6. Step 6: Final answer
    x = 211,313.87

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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.