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Finding the Fourth Proportional to 543,668.30, 815,611.80 and 455,532.20

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Solution

The fourth proportional to 543,668.30, 815,611.80 and 455,532.20 is: 683,389.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,668.30 : 815,611.80 = 455,532.20 : x
  2. Step 2: Convert to fraction form
    543,668.30/815,611.80 = 455,532.20/x
  3. Step 3: Cross multiply
    543,668.30x = 815,611.80 × 455,532.20
  4. Step 4: Simplify right side
    543,668.30x = 371,537,437,599.96
  5. Step 5: Solve for x
    x = 371,537,437,599.96/543,668.30
  6. Step 6: Final answer
    x = 683,389.92

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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.