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Finding the Fourth Proportional to 423,090.30, 634,635.45 and 404,427.90

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Solution

The fourth proportional to 423,090.30, 634,635.45 and 404,427.90 is: 606,641.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,090.30 : 634,635.45 = 404,427.90 : x
  2. Step 2: Convert to fraction form
    423,090.30/634,635.45 = 404,427.90/x
  3. Step 3: Cross multiply
    423,090.30x = 634,635.45 × 404,427.90
  4. Step 4: Simplify right side
    423,090.30x = 256,664,282,309.06
  5. Step 5: Solve for x
    x = 256,664,282,309.06/423,090.30
  6. Step 6: Final answer
    x = 606,641.85

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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.