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Finding the Fourth Proportional to 656,845.89, 906,447.15 and 355,039.89

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Solution

The fourth proportional to 656,845.89, 906,447.15 and 355,039.89 is: 489,954.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,845.89 : 906,447.15 = 355,039.89 : x
  2. Step 2: Convert to fraction form
    656,845.89/906,447.15 = 355,039.89/x
  3. Step 3: Cross multiply
    656,845.89x = 906,447.15 × 355,039.89
  4. Step 4: Simplify right side
    656,845.89x = 321,824,896,426.81
  5. Step 5: Solve for x
    x = 321,824,896,426.81/656,845.89
  6. Step 6: Final answer
    x = 489,954.95

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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.