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Finding the Fourth Proportional to 427,998.96, 642,001.64 and 112,455.28

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Solution

The fourth proportional to 427,998.96, 642,001.64 and 112,455.28 is: 168,683.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,998.96 : 642,001.64 = 112,455.28 : x
  2. Step 2: Convert to fraction form
    427,998.96/642,001.64 = 112,455.28/x
  3. Step 3: Cross multiply
    427,998.96x = 642,001.64 × 112,455.28
  4. Step 4: Simplify right side
    427,998.96x = 72,196,474,186.66
  5. Step 5: Solve for x
    x = 72,196,474,186.66/427,998.96
  6. Step 6: Final answer
    x = 168,683.76

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1.5x scale

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.