Home / 428,999.24-643,498.80-148,516.40

Finding the Fourth Proportional to 428,999.24, 643,498.80 and 148,516.40

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Solution

The fourth proportional to 428,999.24, 643,498.80 and 148,516.40 is: 222,774.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,999.24 : 643,498.80 = 148,516.40 : x
  2. Step 2: Convert to fraction form
    428,999.24/643,498.80 = 148,516.40/x
  3. Step 3: Cross multiply
    428,999.24x = 643,498.80 × 148,516.40
  4. Step 4: Simplify right side
    428,999.24x = 95,570,125,180.32
  5. Step 5: Solve for x
    x = 95,570,125,180.32/428,999.24
  6. Step 6: Final answer
    x = 222,774.58

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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.