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Finding the Fourth Proportional to 505,681.38, 697,840.32 and 279,326.88

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Solution

The fourth proportional to 505,681.38, 697,840.32 and 279,326.88 is: 385,471.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,681.38 : 697,840.32 = 279,326.88 : x
  2. Step 2: Convert to fraction form
    505,681.38/697,840.32 = 279,326.88/x
  3. Step 3: Cross multiply
    505,681.38x = 697,840.32 × 279,326.88
  4. Step 4: Simplify right side
    505,681.38x = 194,925,559,323.80
  5. Step 5: Solve for x
    x = 194,925,559,323.80/505,681.38
  6. Step 6: Final answer
    x = 385,471.10

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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.