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Finding the Fourth Proportional to 543,611.80, 815,417.70 and 455,694.40

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Solution

The fourth proportional to 543,611.80, 815,417.70 and 455,694.40 is: 683,541.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,611.80 : 815,417.70 = 455,694.40 : x
  2. Step 2: Convert to fraction form
    543,611.80/815,417.70 = 455,694.40/x
  3. Step 3: Cross multiply
    543,611.80x = 815,417.70 × 455,694.40
  4. Step 4: Simplify right side
    543,611.80x = 371,581,279,550.88
  5. Step 5: Solve for x
    x = 371,581,279,550.88/543,611.80
  6. Step 6: Final answer
    x = 683,541.60

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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.