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Finding the Fourth Proportional to 561,626.60, 775,045.10 and 306,977.78

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Solution

The fourth proportional to 561,626.60, 775,045.10 and 306,977.78 is: 423,629.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,626.60 : 775,045.10 = 306,977.78 : x
  2. Step 2: Convert to fraction form
    561,626.60/775,045.10 = 306,977.78/x
  3. Step 3: Cross multiply
    561,626.60x = 775,045.10 × 306,977.78
  4. Step 4: Simplify right side
    561,626.60x = 237,921,626,902.94
  5. Step 5: Solve for x
    x = 237,921,626,902.94/561,626.60
  6. Step 6: Final answer
    x = 423,629.56

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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.