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Finding the Fourth Proportional to 286,294.20, 429,441.30 and 99,324.60

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Solution

The fourth proportional to 286,294.20, 429,441.30 and 99,324.60 is: 148,986.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,294.20 : 429,441.30 = 99,324.60 : x
  2. Step 2: Convert to fraction form
    286,294.20/429,441.30 = 99,324.60/x
  3. Step 3: Cross multiply
    286,294.20x = 429,441.30 × 99,324.60
  4. Step 4: Simplify right side
    286,294.20x = 42,654,085,345.98
  5. Step 5: Solve for x
    x = 42,654,085,345.98/286,294.20
  6. Step 6: Final answer
    x = 148,986.90

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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.