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Finding the Fourth Proportional to 298,263.21, 411,055.61 and 279,323.79

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Solution

The fourth proportional to 298,263.21, 411,055.61 and 279,323.79 is: 384,953.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,263.21 : 411,055.61 = 279,323.79 : x
  2. Step 2: Convert to fraction form
    298,263.21/411,055.61 = 279,323.79/x
  3. Step 3: Cross multiply
    298,263.21x = 411,055.61 × 279,323.79
  4. Step 4: Simplify right side
    298,263.21x = 114,817,609,489.34
  5. Step 5: Solve for x
    x = 114,817,609,489.34/298,263.21
  6. Step 6: Final answer
    x = 384,953.98

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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.