Home / 280,450.49-387,018.75-153,125.69

Finding the Fourth Proportional to 280,450.49, 387,018.75 and 153,125.69

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Solution

The fourth proportional to 280,450.49, 387,018.75 and 153,125.69 is: 211,311.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,450.49 : 387,018.75 = 153,125.69 : x
  2. Step 2: Convert to fraction form
    280,450.49/387,018.75 = 153,125.69/x
  3. Step 3: Cross multiply
    280,450.49x = 387,018.75 × 153,125.69
  4. Step 4: Simplify right side
    280,450.49x = 59,262,512,371.06
  5. Step 5: Solve for x
    x = 59,262,512,371.06/280,450.49
  6. Step 6: Final answer
    x = 211,311.85

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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.