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Finding the Fourth Proportional to 656,425.02, 905,865.81 and 354,619.02

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Solution

The fourth proportional to 656,425.02, 905,865.81 and 354,619.02 is: 489,373.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,425.02 : 905,865.81 = 354,619.02 : x
  2. Step 2: Convert to fraction form
    656,425.02/905,865.81 = 354,619.02/x
  3. Step 3: Cross multiply
    656,425.02x = 905,865.81 × 354,619.02
  4. Step 4: Simplify right side
    656,425.02x = 321,237,245,793.71
  5. Step 5: Solve for x
    x = 321,237,245,793.71/656,425.02
  6. Step 6: Final answer
    x = 489,373.86

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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.