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Finding the Fourth Proportional to 312,509.37, 431,240.54 and 183,453.08

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Solution

The fourth proportional to 312,509.37, 431,240.54 and 183,453.08 is: 253,152.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,509.37 : 431,240.54 = 183,453.08 : x
  2. Step 2: Convert to fraction form
    312,509.37/431,240.54 = 183,453.08/x
  3. Step 3: Cross multiply
    312,509.37x = 431,240.54 × 183,453.08
  4. Step 4: Simplify right side
    312,509.37x = 79,112,405,903.33
  5. Step 5: Solve for x
    x = 79,112,405,903.33/312,509.37
  6. Step 6: Final answer
    x = 253,152.11

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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.