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Finding the Fourth Proportional to 505,579.86, 697,695.93 and 279,220.50

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Solution

The fourth proportional to 505,579.86, 697,695.93 and 279,220.50 is: 385,321.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,579.86 : 697,695.93 = 279,220.50 : x
  2. Step 2: Convert to fraction form
    505,579.86/697,695.93 = 279,220.50/x
  3. Step 3: Cross multiply
    505,579.86x = 697,695.93 × 279,220.50
  4. Step 4: Simplify right side
    505,579.86x = 194,811,006,422.57
  5. Step 5: Solve for x
    x = 194,811,006,422.57/505,579.86
  6. Step 6: Final answer
    x = 385,321.93

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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.