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Finding the Fourth Proportional to 398,557.93, 550,206.30 and 276,143.15

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Solution

The fourth proportional to 398,557.93, 550,206.30 and 276,143.15 is: 381,213.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,557.93 : 550,206.30 = 276,143.15 : x
  2. Step 2: Convert to fraction form
    398,557.93/550,206.30 = 276,143.15/x
  3. Step 3: Cross multiply
    398,557.93x = 550,206.30 × 276,143.15
  4. Step 4: Simplify right side
    398,557.93x = 151,935,698,080.81
  5. Step 5: Solve for x
    x = 151,935,698,080.81/398,557.93
  6. Step 6: Final answer
    x = 381,213.59

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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.