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Finding the Fourth Proportional to 656,309.25, 905,706.90 and 354,503.25

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Solution

The fourth proportional to 656,309.25, 905,706.90 and 354,503.25 is: 489,214.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,309.25 : 905,706.90 = 354,503.25 : x
  2. Step 2: Convert to fraction form
    656,309.25/905,706.90 = 354,503.25/x
  3. Step 3: Cross multiply
    656,309.25x = 905,706.90 × 354,503.25
  4. Step 4: Simplify right side
    656,309.25x = 321,076,039,597.43
  5. Step 5: Solve for x
    x = 321,076,039,597.43/656,309.25
  6. Step 6: Final answer
    x = 489,214.56

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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.