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Finding the Fourth Proportional to 262,326.60, 393,885.90 and 209,579.40

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Solution

The fourth proportional to 262,326.60, 393,885.90 and 209,579.40 is: 314,685.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,326.60 : 393,885.90 = 209,579.40 : x
  2. Step 2: Convert to fraction form
    262,326.60/393,885.90 = 209,579.40/x
  3. Step 3: Cross multiply
    262,326.60x = 393,885.90 × 209,579.40
  4. Step 4: Simplify right side
    262,326.60x = 82,550,370,590.46
  5. Step 5: Solve for x
    x = 82,550,370,590.46/262,326.60
  6. Step 6: Final answer
    x = 314,685.47

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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.