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Finding the Fourth Proportional to 346,720.40, 520,080.60 and 204,419.60

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Solution

The fourth proportional to 346,720.40, 520,080.60 and 204,419.60 is: 306,629.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,720.40 : 520,080.60 = 204,419.60 : x
  2. Step 2: Convert to fraction form
    346,720.40/520,080.60 = 204,419.60/x
  3. Step 3: Cross multiply
    346,720.40x = 520,080.60 × 204,419.60
  4. Step 4: Simplify right side
    346,720.40x = 106,314,668,219.76
  5. Step 5: Solve for x
    x = 106,314,668,219.76/346,720.40
  6. Step 6: Final answer
    x = 306,629.40

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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.