Home / 1,147,988.48-1,721,913-428,191.43

Finding the Fourth Proportional to 1,147,988.48, 1,721,913 and 428,191.43

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Solution

The fourth proportional to 1,147,988.48, 1,721,913 and 428,191.43 is: 642,261.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147,988.48 : 1,721,913 = 428,191.43 : x
  2. Step 2: Convert to fraction form
    1,147,988.48/1,721,913 = 428,191.43/x
  3. Step 3: Cross multiply
    1,147,988.48x = 1,721,913 × 428,191.43
  4. Step 4: Simplify right side
    1,147,988.48x = 737,308,389,805.59
  5. Step 5: Solve for x
    x = 737,308,389,805.59/1,147,988.48
  6. Step 6: Final answer
    x = 642,261.14

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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.