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Finding the Fourth Proportional to 543,668.80, 815,612.55 and 455,532.70

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Solution

The fourth proportional to 543,668.80, 815,612.55 and 455,532.70 is: 683,390.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,668.80 : 815,612.55 = 455,532.70 : x
  2. Step 2: Convert to fraction form
    543,668.80/815,612.55 = 455,532.70/x
  3. Step 3: Cross multiply
    543,668.80x = 815,612.55 × 455,532.70
  4. Step 4: Simplify right side
    543,668.80x = 371,538,187,055.39
  5. Step 5: Solve for x
    x = 371,538,187,055.39/543,668.80
  6. Step 6: Final answer
    x = 683,390.67

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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.