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Finding the Fourth Proportional to 1,262,938.16, 1,895,604.88 and 781,710.28

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Solution

The fourth proportional to 1,262,938.16, 1,895,604.88 and 781,710.28 is: 1,173,306.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,262,938.16 : 1,895,604.88 = 781,710.28 : x
  2. Step 2: Convert to fraction form
    1,262,938.16/1,895,604.88 = 781,710.28/x
  3. Step 3: Cross multiply
    1,262,938.16x = 1,895,604.88 × 781,710.28
  4. Step 4: Simplify right side
    1,262,938.16x = 1,481,813,821,514.17
  5. Step 5: Solve for x
    x = 1,481,813,821,514.17/1,262,938.16
  6. Step 6: Final answer
    x = 1,173,306.71

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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.