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Finding the Fourth Proportional to 383,945.60, 575,918.40 and 257,974.40

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Solution

The fourth proportional to 383,945.60, 575,918.40 and 257,974.40 is: 386,961.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,945.60 : 575,918.40 = 257,974.40 : x
  2. Step 2: Convert to fraction form
    383,945.60/575,918.40 = 257,974.40/x
  3. Step 3: Cross multiply
    383,945.60x = 575,918.40 × 257,974.40
  4. Step 4: Simplify right side
    383,945.60x = 148,572,203,688.96
  5. Step 5: Solve for x
    x = 148,572,203,688.96/383,945.60
  6. Step 6: Final answer
    x = 386,961.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.