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Finding the Fourth Proportional to 423,086.20, 634,629.30 and 403,403.20

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Solution

The fourth proportional to 423,086.20, 634,629.30 and 403,403.20 is: 605,104.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,086.20 : 634,629.30 = 403,403.20 : x
  2. Step 2: Convert to fraction form
    423,086.20/634,629.30 = 403,403.20/x
  3. Step 3: Cross multiply
    423,086.20x = 634,629.30 × 403,403.20
  4. Step 4: Simplify right side
    423,086.20x = 256,011,490,433.76
  5. Step 5: Solve for x
    x = 256,011,490,433.76/423,086.20
  6. Step 6: Final answer
    x = 605,104.80

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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.