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Finding the Fourth Proportional to 345,621, 476,956.98 and 186,645

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Solution

The fourth proportional to 345,621, 476,956.98 and 186,645 is: 257,570.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,621 : 476,956.98 = 186,645 : x
  2. Step 2: Convert to fraction form
    345,621/476,956.98 = 186,645/x
  3. Step 3: Cross multiply
    345,621x = 476,956.98 × 186,645
  4. Step 4: Simplify right side
    345,621x = 89,021,635,532.10
  5. Step 5: Solve for x
    x = 89,021,635,532.10/345,621
  6. Step 6: Final answer
    x = 257,570.10

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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.