Home / 280,721.64-421,374.06-187,876.20

Finding the Fourth Proportional to 280,721.64, 421,374.06 and 187,876.20

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Solution

The fourth proportional to 280,721.64, 421,374.06 and 187,876.20 is: 282,009.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,721.64 : 421,374.06 = 187,876.20 : x
  2. Step 2: Convert to fraction form
    280,721.64/421,374.06 = 187,876.20/x
  3. Step 3: Cross multiply
    280,721.64x = 421,374.06 × 187,876.20
  4. Step 4: Simplify right side
    280,721.64x = 79,166,157,171.37
  5. Step 5: Solve for x
    x = 79,166,157,171.37/280,721.64
  6. Step 6: Final answer
    x = 282,009.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.