Home / 428,926.57-642,663.28-284,731.69

Finding the Fourth Proportional to 428,926.57, 642,663.28 and 284,731.69

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Solution

The fourth proportional to 428,926.57, 642,663.28 and 284,731.69 is: 426,615.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,926.57 : 642,663.28 = 284,731.69 : x
  2. Step 2: Convert to fraction form
    428,926.57/642,663.28 = 284,731.69/x
  3. Step 3: Cross multiply
    428,926.57x = 642,663.28 × 284,731.69
  4. Step 4: Simplify right side
    428,926.57x = 182,986,601,815.34
  5. Step 5: Solve for x
    x = 182,986,601,815.34/428,926.57
  6. Step 6: Final answer
    x = 426,615.22

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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.