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Finding the Fourth Proportional to 543,679.80, 815,629.05 and 455,543.70

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Solution

The fourth proportional to 543,679.80, 815,629.05 and 455,543.70 is: 683,407.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,679.80 : 815,629.05 = 455,543.70 : x
  2. Step 2: Convert to fraction form
    543,679.80/815,629.05 = 455,543.70/x
  3. Step 3: Cross multiply
    543,679.80x = 815,629.05 × 455,543.70
  4. Step 4: Simplify right side
    543,679.80x = 371,554,675,264.49
  5. Step 5: Solve for x
    x = 371,554,675,264.49/543,679.80
  6. Step 6: Final answer
    x = 683,407.17

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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.