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Finding the Fourth Proportional to 748,842.40, 1,123,268.40 and 299,600.80

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Solution

The fourth proportional to 748,842.40, 1,123,268.40 and 299,600.80 is: 449,403.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    748,842.40 : 1,123,268.40 = 299,600.80 : x
  2. Step 2: Convert to fraction form
    748,842.40/1,123,268.40 = 299,600.80/x
  3. Step 3: Cross multiply
    748,842.40x = 1,123,268.40 × 299,600.80
  4. Step 4: Simplify right side
    748,842.40x = 336,532,111,254.72
  5. Step 5: Solve for x
    x = 336,532,111,254.72/748,842.40
  6. Step 6: Final answer
    x = 449,403.12

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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.