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Finding the Fourth Proportional to 286,179.20, 429,268.80 and 99,209.60

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Solution

The fourth proportional to 286,179.20, 429,268.80 and 99,209.60 is: 148,814.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,179.20 : 429,268.80 = 99,209.60 : x
  2. Step 2: Convert to fraction form
    286,179.20/429,268.80 = 99,209.60/x
  3. Step 3: Cross multiply
    286,179.20x = 429,268.80 × 99,209.60
  4. Step 4: Simplify right side
    286,179.20x = 42,587,585,940.48
  5. Step 5: Solve for x
    x = 42,587,585,940.48/286,179.20
  6. Step 6: Final answer
    x = 148,814.40

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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.