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Finding the Fourth Proportional to 286,309.30, 429,354.60 and 86,563.30

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Solution

The fourth proportional to 286,309.30, 429,354.60 and 86,563.30 is: 129,811.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,309.30 : 429,354.60 = 86,563.30 : x
  2. Step 2: Convert to fraction form
    286,309.30/429,354.60 = 86,563.30/x
  3. Step 3: Cross multiply
    286,309.30x = 429,354.60 × 86,563.30
  4. Step 4: Simplify right side
    286,309.30x = 37,166,351,046.18
  5. Step 5: Solve for x
    x = 37,166,351,046.18/286,309.30
  6. Step 6: Final answer
    x = 129,811.89

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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.