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Finding the Fourth Proportional to 290,574.72, 436,518.23 and 172,323.63

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Solution

The fourth proportional to 290,574.72, 436,518.23 and 172,323.63 is: 258,874.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,574.72 : 436,518.23 = 172,323.63 : x
  2. Step 2: Convert to fraction form
    290,574.72/436,518.23 = 172,323.63/x
  3. Step 3: Cross multiply
    290,574.72x = 436,518.23 × 172,323.63
  4. Step 4: Simplify right side
    290,574.72x = 75,222,405,093.16
  5. Step 5: Solve for x
    x = 75,222,405,093.16/290,574.72
  6. Step 6: Final answer
    x = 258,874.57

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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.