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Finding the Fourth Proportional to 311,859.90, 430,268.41 and 190,875.06

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Solution

The fourth proportional to 311,859.90, 430,268.41 and 190,875.06 is: 263,347.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,859.90 : 430,268.41 = 190,875.06 : x
  2. Step 2: Convert to fraction form
    311,859.90/430,268.41 = 190,875.06/x
  3. Step 3: Cross multiply
    311,859.90x = 430,268.41 × 190,875.06
  4. Step 4: Simplify right side
    311,859.90x = 82,127,508,574.85
  5. Step 5: Solve for x
    x = 82,127,508,574.85/311,859.90
  6. Step 6: Final answer
    x = 263,347.45

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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.