Home / 312,269.19-431,139.60-210,446.07

Finding the Fourth Proportional to 312,269.19, 431,139.60 and 210,446.07

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Solution

The fourth proportional to 312,269.19, 431,139.60 and 210,446.07 is: 290,555.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,269.19 : 431,139.60 = 210,446.07 : x
  2. Step 2: Convert to fraction form
    312,269.19/431,139.60 = 210,446.07/x
  3. Step 3: Cross multiply
    312,269.19x = 431,139.60 × 210,446.07
  4. Step 4: Simplify right side
    312,269.19x = 90,731,634,441.37
  5. Step 5: Solve for x
    x = 90,731,634,441.37/312,269.19
  6. Step 6: Final answer
    x = 290,555.83

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Double scale
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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.