Home / 428,897.07-643,351.08-113,351.25

Finding the Fourth Proportional to 428,897.07, 643,351.08 and 113,351.25

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Solution

The fourth proportional to 428,897.07, 643,351.08 and 113,351.25 is: 170,028.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,897.07 : 643,351.08 = 113,351.25 : x
  2. Step 2: Convert to fraction form
    428,897.07/643,351.08 = 113,351.25/x
  3. Step 3: Cross multiply
    428,897.07x = 643,351.08 × 113,351.25
  4. Step 4: Simplify right side
    428,897.07x = 72,924,649,106.85
  5. Step 5: Solve for x
    x = 72,924,649,106.85/428,897.07
  6. Step 6: Final answer
    x = 170,028.32

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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.