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Finding the Fourth Proportional to 505,750.89, 697,876.73 and 279,382.89

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Solution

The fourth proportional to 505,750.89, 697,876.73 and 279,382.89 is: 385,515.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,750.89 : 697,876.73 = 279,382.89 : x
  2. Step 2: Convert to fraction form
    505,750.89/697,876.73 = 279,382.89/x
  3. Step 3: Cross multiply
    505,750.89x = 697,876.73 × 279,382.89
  4. Step 4: Simplify right side
    505,750.89x = 194,974,816,294.24
  5. Step 5: Solve for x
    x = 194,974,816,294.24/505,750.89
  6. Step 6: Final answer
    x = 385,515.52

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Double scale
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Similar ratio
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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.