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Finding the Fourth Proportional to 1,293,532.98, 1,938,828.08 and 786,977.42

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Solution

The fourth proportional to 1,293,532.98, 1,938,828.08 and 786,977.42 is: 1,179,570.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,293,532.98 : 1,938,828.08 = 786,977.42 : x
  2. Step 2: Convert to fraction form
    1,293,532.98/1,938,828.08 = 786,977.42/x
  3. Step 3: Cross multiply
    1,293,532.98x = 1,938,828.08 × 786,977.42
  4. Step 4: Simplify right side
    1,293,532.98x = 1,525,813,920,221.95
  5. Step 5: Solve for x
    x = 1,525,813,920,221.95/1,293,532.98
  6. Step 6: Final answer
    x = 1,179,570.95

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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.