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Finding the Fourth Proportional to 429,998.40, 644,997.60 and 403,426.35

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Solution

The fourth proportional to 429,998.40, 644,997.60 and 403,426.35 is: 605,139.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,998.40 : 644,997.60 = 403,426.35 : x
  2. Step 2: Convert to fraction form
    429,998.40/644,997.60 = 403,426.35/x
  3. Step 3: Cross multiply
    429,998.40x = 644,997.60 × 403,426.35
  4. Step 4: Simplify right side
    429,998.40x = 260,209,027,526.76
  5. Step 5: Solve for x
    x = 260,209,027,526.76/429,998.40
  6. Step 6: Final answer
    x = 605,139.53

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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.