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Finding the Fourth Proportional to 505,084.88, 697,021.20 and 275,643.98

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Solution

The fourth proportional to 505,084.88, 697,021.20 and 275,643.98 is: 380,390.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,084.88 : 697,021.20 = 275,643.98 : x
  2. Step 2: Convert to fraction form
    505,084.88/697,021.20 = 275,643.98/x
  3. Step 3: Cross multiply
    505,084.88x = 697,021.20 × 275,643.98
  4. Step 4: Simplify right side
    505,084.88x = 192,129,697,712.38
  5. Step 5: Solve for x
    x = 192,129,697,712.38/505,084.88
  6. Step 6: Final answer
    x = 380,390.91

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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.