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Finding the Fourth Proportional to 543,640.90, 816,336.15 and 366,931.30

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Solution

The fourth proportional to 543,640.90, 816,336.15 and 366,931.30 is: 550,987.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,640.90 : 816,336.15 = 366,931.30 : x
  2. Step 2: Convert to fraction form
    543,640.90/816,336.15 = 366,931.30/x
  3. Step 3: Cross multiply
    543,640.90x = 816,336.15 × 366,931.30
  4. Step 4: Simplify right side
    543,640.90x = 299,539,284,756.50
  5. Step 5: Solve for x
    x = 299,539,284,756.50/543,640.90
  6. Step 6: Final answer
    x = 550,987.40

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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.