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Finding the Fourth Proportional to 490,696.37, 677,060.79 and 286,707.87

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Solution

The fourth proportional to 490,696.37, 677,060.79 and 286,707.87 is: 395,598.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,696.37 : 677,060.79 = 286,707.87 : x
  2. Step 2: Convert to fraction form
    490,696.37/677,060.79 = 286,707.87/x
  3. Step 3: Cross multiply
    490,696.37x = 677,060.79 × 286,707.87
  4. Step 4: Simplify right side
    490,696.37x = 194,118,656,961.42
  5. Step 5: Solve for x
    x = 194,118,656,961.42/490,696.37
  6. Step 6: Final answer
    x = 395,598.32

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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.