Home / 428,416.10-641,948.24-158,172.62

Finding the Fourth Proportional to 428,416.10, 641,948.24 and 158,172.62

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Solution

The fourth proportional to 428,416.10, 641,948.24 and 158,172.62 is: 237,009.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,416.10 : 641,948.24 = 158,172.62 : x
  2. Step 2: Convert to fraction form
    428,416.10/641,948.24 = 158,172.62/x
  3. Step 3: Cross multiply
    428,416.10x = 641,948.24 × 158,172.62
  4. Step 4: Simplify right side
    428,416.10x = 101,538,635,025.19
  5. Step 5: Solve for x
    x = 101,538,635,025.19/428,416.10
  6. Step 6: Final answer
    x = 237,009.38

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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.