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Finding the Fourth Proportional to 1,293,534.81, 1,938,830.67 and 786,979.17

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Solution

The fourth proportional to 1,293,534.81, 1,938,830.67 and 786,979.17 is: 1,179,573.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,293,534.81 : 1,938,830.67 = 786,979.17 : x
  2. Step 2: Convert to fraction form
    1,293,534.81/1,938,830.67 = 786,979.17/x
  3. Step 3: Cross multiply
    1,293,534.81x = 1,938,830.67 × 786,979.17
  4. Step 4: Simplify right side
    1,293,534.81x = 1,525,819,351,447.14
  5. Step 5: Solve for x
    x = 1,525,819,351,447.14/1,293,534.81
  6. Step 6: Final answer
    x = 1,179,573.48

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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.