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Finding the Fourth Proportional to 429,007.30, 643,316.55 and 162,679.30

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Solution

The fourth proportional to 429,007.30, 643,316.55 and 162,679.30 is: 243,945.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,007.30 : 643,316.55 = 162,679.30 : x
  2. Step 2: Convert to fraction form
    429,007.30/643,316.55 = 162,679.30/x
  3. Step 3: Cross multiply
    429,007.30x = 643,316.55 × 162,679.30
  4. Step 4: Simplify right side
    429,007.30x = 104,654,286,032.42
  5. Step 5: Solve for x
    x = 104,654,286,032.42/429,007.30
  6. Step 6: Final answer
    x = 243,945.23

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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.