Home / 428,801.40-643,070.34-296,531.64

Finding the Fourth Proportional to 428,801.40, 643,070.34 and 296,531.64

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Solution

The fourth proportional to 428,801.40, 643,070.34 and 296,531.64 is: 444,706.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,801.40 : 643,070.34 = 296,531.64 : x
  2. Step 2: Convert to fraction form
    428,801.40/643,070.34 = 296,531.64/x
  3. Step 3: Cross multiply
    428,801.40x = 643,070.34 × 296,531.64
  4. Step 4: Simplify right side
    428,801.40x = 190,690,702,555.56
  5. Step 5: Solve for x
    x = 190,690,702,555.56/428,801.40
  6. Step 6: Final answer
    x = 444,706.34

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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.