Home / 428,825.25-643,237.88-293,756.13

Finding the Fourth Proportional to 428,825.25, 643,237.88 and 293,756.13

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Solution

The fourth proportional to 428,825.25, 643,237.88 and 293,756.13 is: 440,634.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,825.25 : 643,237.88 = 293,756.13 : x
  2. Step 2: Convert to fraction form
    428,825.25/643,237.88 = 293,756.13/x
  3. Step 3: Cross multiply
    428,825.25x = 643,237.88 × 293,756.13
  4. Step 4: Simplify right side
    428,825.25x = 188,955,068,829.42
  5. Step 5: Solve for x
    x = 188,955,068,829.42/428,825.25
  6. Step 6: Final answer
    x = 440,634.20

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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.