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Finding the Fourth Proportional to 311,518.51, 429,895.93 and 168,278.56

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Solution

The fourth proportional to 311,518.51, 429,895.93 and 168,278.56 is: 232,224.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,518.51 : 429,895.93 = 168,278.56 : x
  2. Step 2: Convert to fraction form
    311,518.51/429,895.93 = 168,278.56/x
  3. Step 3: Cross multiply
    311,518.51x = 429,895.93 × 168,278.56
  4. Step 4: Simplify right side
    311,518.51x = 72,342,268,050.26
  5. Step 5: Solve for x
    x = 72,342,268,050.26/311,518.51
  6. Step 6: Final answer
    x = 232,224.62

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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.