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Finding the Fourth Proportional to 554,015.13, 830,842.78 and 212,440.60

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Solution

The fourth proportional to 554,015.13, 830,842.78 and 212,440.60 is: 318,591.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,015.13 : 830,842.78 = 212,440.60 : x
  2. Step 2: Convert to fraction form
    554,015.13/830,842.78 = 212,440.60/x
  3. Step 3: Cross multiply
    554,015.13x = 830,842.78 × 212,440.60
  4. Step 4: Simplify right side
    554,015.13x = 176,504,738,641.46
  5. Step 5: Solve for x
    x = 176,504,738,641.46/554,015.13
  6. Step 6: Final answer
    x = 318,591.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.