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Finding the Fourth Proportional to 311,352.28, 429,698.52 and 190,574.08

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Solution

The fourth proportional to 311,352.28, 429,698.52 and 190,574.08 is: 263,012.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,352.28 : 429,698.52 = 190,574.08 : x
  2. Step 2: Convert to fraction form
    311,352.28/429,698.52 = 190,574.08/x
  3. Step 3: Cross multiply
    311,352.28x = 429,698.52 × 190,574.08
  4. Step 4: Simplify right side
    311,352.28x = 81,889,400,126.36
  5. Step 5: Solve for x
    x = 81,889,400,126.36/311,352.28
  6. Step 6: Final answer
    x = 263,012.05

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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.