Home / 428,000.08-642,097.40-228,215.12

Finding the Fourth Proportional to 428,000.08, 642,097.40 and 228,215.12

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Solution

The fourth proportional to 428,000.08, 642,097.40 and 228,215.12 is: 342,374.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,000.08 : 642,097.40 = 228,215.12 : x
  2. Step 2: Convert to fraction form
    428,000.08/642,097.40 = 228,215.12/x
  3. Step 3: Cross multiply
    428,000.08x = 642,097.40 × 228,215.12
  4. Step 4: Simplify right side
    428,000.08x = 146,536,335,192.69
  5. Step 5: Solve for x
    x = 146,536,335,192.69/428,000.08
  6. Step 6: Final answer
    x = 342,374.55

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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.