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Finding the Fourth Proportional to 415,695.20, 621,985.80 and 296,028.80

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Solution

The fourth proportional to 415,695.20, 621,985.80 and 296,028.80 is: 442,934.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,695.20 : 621,985.80 = 296,028.80 : x
  2. Step 2: Convert to fraction form
    415,695.20/621,985.80 = 296,028.80/x
  3. Step 3: Cross multiply
    415,695.20x = 621,985.80 × 296,028.80
  4. Step 4: Simplify right side
    415,695.20x = 184,125,709,991.04
  5. Step 5: Solve for x
    x = 184,125,709,991.04/415,695.20
  6. Step 6: Final answer
    x = 442,934.41

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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.