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Finding the Fourth Proportional to 279,812.64, 386,140.86 and 152,487.93

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Solution

The fourth proportional to 279,812.64, 386,140.86 and 152,487.93 is: 210,433.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,812.64 : 386,140.86 = 152,487.93 : x
  2. Step 2: Convert to fraction form
    279,812.64/386,140.86 = 152,487.93/x
  3. Step 3: Cross multiply
    279,812.64x = 386,140.86 × 152,487.93
  4. Step 4: Simplify right side
    279,812.64x = 58,881,820,429.82
  5. Step 5: Solve for x
    x = 58,881,820,429.82/279,812.64
  6. Step 6: Final answer
    x = 210,433.03

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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.