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Finding the Fourth Proportional to 340,439.60, 510,659.40 and 91,121.60

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Solution

The fourth proportional to 340,439.60, 510,659.40 and 91,121.60 is: 136,682.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,439.60 : 510,659.40 = 91,121.60 : x
  2. Step 2: Convert to fraction form
    340,439.60/510,659.40 = 91,121.60/x
  3. Step 3: Cross multiply
    340,439.60x = 510,659.40 × 91,121.60
  4. Step 4: Simplify right side
    340,439.60x = 46,532,101,583.04
  5. Step 5: Solve for x
    x = 46,532,101,583.04/340,439.60
  6. Step 6: Final answer
    x = 136,682.40

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1.5x scale

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.