Home / 280,451.24-387,019.78-153,126.44

Finding the Fourth Proportional to 280,451.24, 387,019.78 and 153,126.44

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Solution

The fourth proportional to 280,451.24, 387,019.78 and 153,126.44 is: 211,312.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,451.24 : 387,019.78 = 153,126.44 : x
  2. Step 2: Convert to fraction form
    280,451.24/387,019.78 = 153,126.44/x
  3. Step 3: Cross multiply
    280,451.24x = 387,019.78 × 153,126.44
  4. Step 4: Simplify right side
    280,451.24x = 59,262,961,120.98
  5. Step 5: Solve for x
    x = 59,262,961,120.98/280,451.24
  6. Step 6: Final answer
    x = 211,312.89

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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.