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Finding the Fourth Proportional to 286,035.20, 428,858.40 and 108,515.60

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Solution

The fourth proportional to 286,035.20, 428,858.40 and 108,515.60 is: 162,699.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,035.20 : 428,858.40 = 108,515.60 : x
  2. Step 2: Convert to fraction form
    286,035.20/428,858.40 = 108,515.60/x
  3. Step 3: Cross multiply
    286,035.20x = 428,858.40 × 108,515.60
  4. Step 4: Simplify right side
    286,035.20x = 46,537,826,591.04
  5. Step 5: Solve for x
    x = 46,537,826,591.04/286,035.20
  6. Step 6: Final answer
    x = 162,699.65

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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.