Home / 428,913.83-643,151.04-226,618.53

Finding the Fourth Proportional to 428,913.83, 643,151.04 and 226,618.53

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Solution

The fourth proportional to 428,913.83, 643,151.04 and 226,618.53 is: 339,811.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,913.83 : 643,151.04 = 226,618.53 : x
  2. Step 2: Convert to fraction form
    428,913.83/643,151.04 = 226,618.53/x
  3. Step 3: Cross multiply
    428,913.83x = 643,151.04 × 226,618.53
  4. Step 4: Simplify right side
    428,913.83x = 145,749,943,252.77
  5. Step 5: Solve for x
    x = 145,749,943,252.77/428,913.83
  6. Step 6: Final answer
    x = 339,811.72

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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.