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Finding the Fourth Proportional to 656,307, 905,704.02 and 354,501

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Solution

The fourth proportional to 656,307, 905,704.02 and 354,501 is: 489,211.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,307 : 905,704.02 = 354,501 : x
  2. Step 2: Convert to fraction form
    656,307/905,704.02 = 354,501/x
  3. Step 3: Cross multiply
    656,307x = 905,704.02 × 354,501
  4. Step 4: Simplify right side
    656,307x = 321,072,980,794.02
  5. Step 5: Solve for x
    x = 321,072,980,794.02/656,307
  6. Step 6: Final answer
    x = 489,211.57

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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.