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Finding the Fourth Proportional to 921,640.80, 1,294,029.60 and 921,640.80

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Solution

The fourth proportional to 921,640.80, 1,294,029.60 and 921,640.80 is: 1,294,029.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,640.80 : 1,294,029.60 = 921,640.80 : x
  2. Step 2: Convert to fraction form
    921,640.80/1,294,029.60 = 921,640.80/x
  3. Step 3: Cross multiply
    921,640.80x = 1,294,029.60 × 921,640.80
  4. Step 4: Simplify right side
    921,640.80x = 1,192,630,475,767.68
  5. Step 5: Solve for x
    x = 1,192,630,475,767.68/921,640.80
  6. Step 6: Final answer
    x = 1,294,029.60

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.