Home / 428,515.76-642,681.24-270,533.36

Finding the Fourth Proportional to 428,515.76, 642,681.24 and 270,533.36

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Solution

The fourth proportional to 428,515.76, 642,681.24 and 270,533.36 is: 405,741.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,515.76 : 642,681.24 = 270,533.36 : x
  2. Step 2: Convert to fraction form
    428,515.76/642,681.24 = 270,533.36/x
  3. Step 3: Cross multiply
    428,515.76x = 642,681.24 × 270,533.36
  4. Step 4: Simplify right side
    428,515.76x = 173,866,715,266.17
  5. Step 5: Solve for x
    x = 173,866,715,266.17/428,515.76
  6. Step 6: Final answer
    x = 405,741.71

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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.