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Finding the Fourth Proportional to 543,670.80, 815,615.55 and 455,534.70

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Solution

The fourth proportional to 543,670.80, 815,615.55 and 455,534.70 is: 683,393.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,670.80 : 815,615.55 = 455,534.70 : x
  2. Step 2: Convert to fraction form
    543,670.80/815,615.55 = 455,534.70/x
  3. Step 3: Cross multiply
    543,670.80x = 815,615.55 × 455,534.70
  4. Step 4: Simplify right side
    543,670.80x = 371,541,184,884.59
  5. Step 5: Solve for x
    x = 371,541,184,884.59/543,670.80
  6. Step 6: Final answer
    x = 683,393.67

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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.