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Finding the Fourth Proportional to 429,009.80, 643,320.30 and 162,681.80

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Solution

The fourth proportional to 429,009.80, 643,320.30 and 162,681.80 is: 243,948.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,009.80 : 643,320.30 = 162,681.80 : x
  2. Step 2: Convert to fraction form
    429,009.80/643,320.30 = 162,681.80/x
  3. Step 3: Cross multiply
    429,009.80x = 643,320.30 × 162,681.80
  4. Step 4: Simplify right side
    429,009.80x = 104,656,504,380.54
  5. Step 5: Solve for x
    x = 104,656,504,380.54/429,009.80
  6. Step 6: Final answer
    x = 243,948.98

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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.