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Finding the Fourth Proportional to 656,653.80, 906,180.30 and 354,847.80

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Solution

The fourth proportional to 656,653.80, 906,180.30 and 354,847.80 is: 489,688.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,653.80 : 906,180.30 = 354,847.80 : x
  2. Step 2: Convert to fraction form
    656,653.80/906,180.30 = 354,847.80/x
  3. Step 3: Cross multiply
    656,653.80x = 906,180.30 × 354,847.80
  4. Step 4: Simplify right side
    656,653.80x = 321,556,085,858.34
  5. Step 5: Solve for x
    x = 321,556,085,858.34/656,653.80
  6. Step 6: Final answer
    x = 489,688.91

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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.