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Finding the Fourth Proportional to 279,560.13, 385,809.18 and 210,526

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Solution

The fourth proportional to 279,560.13, 385,809.18 and 210,526 is: 290,538.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,560.13 : 385,809.18 = 210,526 : x
  2. Step 2: Convert to fraction form
    279,560.13/385,809.18 = 210,526/x
  3. Step 3: Cross multiply
    279,560.13x = 385,809.18 × 210,526
  4. Step 4: Simplify right side
    279,560.13x = 81,222,863,428.68
  5. Step 5: Solve for x
    x = 81,222,863,428.68/279,560.13
  6. Step 6: Final answer
    x = 290,538.08

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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.