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Finding the Fourth Proportional to 513,688.60, 770,532.90 and 139,711.60

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Solution

The fourth proportional to 513,688.60, 770,532.90 and 139,711.60 is: 209,567.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,688.60 : 770,532.90 = 139,711.60 : x
  2. Step 2: Convert to fraction form
    513,688.60/770,532.90 = 139,711.60/x
  3. Step 3: Cross multiply
    513,688.60x = 770,532.90 × 139,711.60
  4. Step 4: Simplify right side
    513,688.60x = 107,652,384,311.64
  5. Step 5: Solve for x
    x = 107,652,384,311.64/513,688.60
  6. Step 6: Final answer
    x = 209,567.40

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Similar ratio
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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.