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Finding the Fourth Proportional to 279,810.64, 386,138.10 and 152,485.93

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Solution

The fourth proportional to 279,810.64, 386,138.10 and 152,485.93 is: 210,430.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,810.64 : 386,138.10 = 152,485.93 : x
  2. Step 2: Convert to fraction form
    279,810.64/386,138.10 = 152,485.93/x
  3. Step 3: Cross multiply
    279,810.64x = 386,138.10 × 152,485.93
  4. Step 4: Simplify right side
    279,810.64x = 58,880,627,286.93
  5. Step 5: Solve for x
    x = 58,880,627,286.93/279,810.64
  6. Step 6: Final answer
    x = 210,430.27

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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.