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Finding the Fourth Proportional to 505,409.67, 697,479.71 and 275,981.54

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Solution

The fourth proportional to 505,409.67, 697,479.71 and 275,981.54 is: 380,862.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,409.67 : 697,479.71 = 275,981.54 : x
  2. Step 2: Convert to fraction form
    505,409.67/697,479.71 = 275,981.54/x
  3. Step 3: Cross multiply
    505,409.67x = 697,479.71 × 275,981.54
  4. Step 4: Simplify right side
    505,409.67x = 192,491,519,617.25
  5. Step 5: Solve for x
    x = 192,491,519,617.25/505,409.67
  6. Step 6: Final answer
    x = 380,862.36

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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.