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Finding the Fourth Proportional to 543,721.80, 815,692.05 and 455,585.70

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Solution

The fourth proportional to 543,721.80, 815,692.05 and 455,585.70 is: 683,470.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,721.80 : 815,692.05 = 455,585.70 : x
  2. Step 2: Convert to fraction form
    543,721.80/815,692.05 = 455,585.70/x
  3. Step 3: Cross multiply
    543,721.80x = 815,692.05 × 455,585.70
  4. Step 4: Simplify right side
    543,721.80x = 371,617,633,583.69
  5. Step 5: Solve for x
    x = 371,617,633,583.69/543,721.80
  6. Step 6: Final answer
    x = 683,470.17

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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.