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Finding the Fourth Proportional to 353,685.44, 487,941.60 and 217,678.34

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Solution

The fourth proportional to 353,685.44, 487,941.60 and 217,678.34 is: 300,307.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,685.44 : 487,941.60 = 217,678.34 : x
  2. Step 2: Convert to fraction form
    353,685.44/487,941.60 = 217,678.34/x
  3. Step 3: Cross multiply
    353,685.44x = 487,941.60 × 217,678.34
  4. Step 4: Simplify right side
    353,685.44x = 106,214,317,504.94
  5. Step 5: Solve for x
    x = 106,214,317,504.94/353,685.44
  6. Step 6: Final answer
    x = 300,307.29

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1.5x scale

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.