Home / 428,570.40-642,945.51-162,325.02

Finding the Fourth Proportional to 428,570.40, 642,945.51 and 162,325.02

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Solution

The fourth proportional to 428,570.40, 642,945.51 and 162,325.02 is: 243,521.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,570.40 : 642,945.51 = 162,325.02 : x
  2. Step 2: Convert to fraction form
    428,570.40/642,945.51 = 162,325.02/x
  3. Step 3: Cross multiply
    428,570.40x = 642,945.51 × 162,325.02
  4. Step 4: Simplify right side
    428,570.40x = 104,366,142,769.66
  5. Step 5: Solve for x
    x = 104,366,142,769.66/428,570.40
  6. Step 6: Final answer
    x = 243,521.58

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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.