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Finding the Fourth Proportional to 317,880.81, 438,790.61 and 210,485.43

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Solution

The fourth proportional to 317,880.81, 438,790.61 and 210,485.43 is: 290,546.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,880.81 : 438,790.61 = 210,485.43 : x
  2. Step 2: Convert to fraction form
    317,880.81/438,790.61 = 210,485.43/x
  3. Step 3: Cross multiply
    317,880.81x = 438,790.61 × 210,485.43
  4. Step 4: Simplify right side
    317,880.81x = 92,359,030,752.03
  5. Step 5: Solve for x
    x = 92,359,030,752.03/317,880.81
  6. Step 6: Final answer
    x = 290,546.10

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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.