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Finding the Fourth Proportional to 505,721.64, 697,836.42 and 279,353.64

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Solution

The fourth proportional to 505,721.64, 697,836.42 and 279,353.64 is: 385,475.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,721.64 : 697,836.42 = 279,353.64 : x
  2. Step 2: Convert to fraction form
    505,721.64/697,836.42 = 279,353.64/x
  3. Step 3: Cross multiply
    505,721.64x = 697,836.42 × 279,353.64
  4. Step 4: Simplify right side
    505,721.64x = 194,943,144,051.57
  5. Step 5: Solve for x
    x = 194,943,144,051.57/505,721.64
  6. Step 6: Final answer
    x = 385,475.19

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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.