Home / 428,767.54-643,156.75-162,456.52

Finding the Fourth Proportional to 428,767.54, 643,156.75 and 162,456.52

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Solution

The fourth proportional to 428,767.54, 643,156.75 and 162,456.52 is: 243,686.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,767.54 : 643,156.75 = 162,456.52 : x
  2. Step 2: Convert to fraction form
    428,767.54/643,156.75 = 162,456.52/x
  3. Step 3: Cross multiply
    428,767.54x = 643,156.75 × 162,456.52
  4. Step 4: Simplify right side
    428,767.54x = 104,485,007,419.51
  5. Step 5: Solve for x
    x = 104,485,007,419.51/428,767.54
  6. Step 6: Final answer
    x = 243,686.84

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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.