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Finding the Fourth Proportional to 312,012.15, 430,574.74 and 168,769.12

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Solution

The fourth proportional to 312,012.15, 430,574.74 and 168,769.12 is: 232,900.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,012.15 : 430,574.74 = 168,769.12 : x
  2. Step 2: Convert to fraction form
    312,012.15/430,574.74 = 168,769.12/x
  3. Step 3: Cross multiply
    312,012.15x = 430,574.74 × 168,769.12
  4. Step 4: Simplify right side
    312,012.15x = 72,667,719,273.00
  5. Step 5: Solve for x
    x = 72,667,719,273.00/312,012.15
  6. Step 6: Final answer
    x = 232,900.29

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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.