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Finding the Fourth Proportional to 280,851.20, 421,263.84 and 70,484.48

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Solution

The fourth proportional to 280,851.20, 421,263.84 and 70,484.48 is: 105,723.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,851.20 : 421,263.84 = 70,484.48 : x
  2. Step 2: Convert to fraction form
    280,851.20/421,263.84 = 70,484.48/x
  3. Step 3: Cross multiply
    280,851.20x = 421,263.84 × 70,484.48
  4. Step 4: Simplify right side
    280,851.20x = 29,692,562,705.20
  5. Step 5: Solve for x
    x = 29,692,562,705.20/280,851.20
  6. Step 6: Final answer
    x = 105,723.47

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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.