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Finding the Fourth Proportional to 513,815.55, 720,522.75 and 513,815.55

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Solution

The fourth proportional to 513,815.55, 720,522.75 and 513,815.55 is: 720,522.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,815.55 : 720,522.75 = 513,815.55 : x
  2. Step 2: Convert to fraction form
    513,815.55/720,522.75 = 513,815.55/x
  3. Step 3: Cross multiply
    513,815.55x = 720,522.75 × 513,815.55
  4. Step 4: Simplify right side
    513,815.55x = 370,215,793,078.76
  5. Step 5: Solve for x
    x = 370,215,793,078.76/513,815.55
  6. Step 6: Final answer
    x = 720,522.75

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.