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Finding the Fourth Proportional to 279,762.75, 386,072.64 and 152,438.31

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Solution

The fourth proportional to 279,762.75, 386,072.64 and 152,438.31 is: 210,364.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,762.75 : 386,072.64 = 152,438.31 : x
  2. Step 2: Convert to fraction form
    279,762.75/386,072.64 = 152,438.31/x
  3. Step 3: Cross multiply
    279,762.75x = 386,072.64 × 152,438.31
  4. Step 4: Simplify right side
    279,762.75x = 58,852,260,778.84
  5. Step 5: Solve for x
    x = 58,852,260,778.84/279,762.75
  6. Step 6: Final answer
    x = 210,364.89

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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.