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Finding the Fourth Proportional to 390,366, 585,549 and 94,878

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Solution

The fourth proportional to 390,366, 585,549 and 94,878 is: 142,317

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,366 : 585,549 = 94,878 : x
  2. Step 2: Convert to fraction form
    390,366/585,549 = 94,878/x
  3. Step 3: Cross multiply
    390,366x = 585,549 × 94,878
  4. Step 4: Simplify right side
    390,366x = 55,555,718,022
  5. Step 5: Solve for x
    x = 55,555,718,022/390,366
  6. Step 6: Final answer
    x = 142,317

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.