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Finding the Fourth Proportional to 279,811.64, 386,139.48 and 152,486.93

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Solution

The fourth proportional to 279,811.64, 386,139.48 and 152,486.93 is: 210,431.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,811.64 : 386,139.48 = 152,486.93 : x
  2. Step 2: Convert to fraction form
    279,811.64/386,139.48 = 152,486.93/x
  3. Step 3: Cross multiply
    279,811.64x = 386,139.48 × 152,486.93
  4. Step 4: Simplify right side
    279,811.64x = 58,881,223,857.00
  5. Step 5: Solve for x
    x = 58,881,223,857.00/279,811.64
  6. Step 6: Final answer
    x = 210,431.65

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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.