Home / 280,944.72-421,220.12-103,428.63

Finding the Fourth Proportional to 280,944.72, 421,220.12 and 103,428.63

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Solution

The fourth proportional to 280,944.72, 421,220.12 and 103,428.63 is: 155,070.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,944.72 : 421,220.12 = 103,428.63 : x
  2. Step 2: Convert to fraction form
    280,944.72/421,220.12 = 103,428.63/x
  3. Step 3: Cross multiply
    280,944.72x = 421,220.12 × 103,428.63
  4. Step 4: Simplify right side
    280,944.72x = 43,566,219,422.89
  5. Step 5: Solve for x
    x = 43,566,219,422.89/280,944.72
  6. Step 6: Final answer
    x = 155,070.43

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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.