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Finding the Fourth Proportional to 685,427.64, 945,902.70 and 383,620.92

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Solution

The fourth proportional to 685,427.64, 945,902.70 and 383,620.92 is: 529,403.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,427.64 : 945,902.70 = 383,620.92 : x
  2. Step 2: Convert to fraction form
    685,427.64/945,902.70 = 383,620.92/x
  3. Step 3: Cross multiply
    685,427.64x = 945,902.70 × 383,620.92
  4. Step 4: Simplify right side
    685,427.64x = 362,868,064,004.48
  5. Step 5: Solve for x
    x = 362,868,064,004.48/685,427.64
  6. Step 6: Final answer
    x = 529,403.90

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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.