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Finding the Fourth Proportional to 656,377.20, 905,800.32 and 354,571.20

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Solution

The fourth proportional to 656,377.20, 905,800.32 and 354,571.20 is: 489,308.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,377.20 : 905,800.32 = 354,571.20 : x
  2. Step 2: Convert to fraction form
    656,377.20/905,800.32 = 354,571.20/x
  3. Step 3: Cross multiply
    656,377.20x = 905,800.32 × 354,571.20
  4. Step 4: Simplify right side
    656,377.20x = 321,170,706,422.78
  5. Step 5: Solve for x
    x = 321,170,706,422.78/656,377.20
  6. Step 6: Final answer
    x = 489,308.14

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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.