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Finding the Fourth Proportional to 1,359,748.80, 2,040,400.80 and 939,326.40

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Solution

The fourth proportional to 1,359,748.80, 2,040,400.80 and 939,326.40 is: 1,409,526.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,359,748.80 : 2,040,400.80 = 939,326.40 : x
  2. Step 2: Convert to fraction form
    1,359,748.80/2,040,400.80 = 939,326.40/x
  3. Step 3: Cross multiply
    1,359,748.80x = 2,040,400.80 × 939,326.40
  4. Step 4: Simplify right side
    1,359,748.80x = 1,916,602,338,021.12
  5. Step 5: Solve for x
    x = 1,916,602,338,021.12/1,359,748.80
  6. Step 6: Final answer
    x = 1,409,526.77

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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.