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Finding the Fourth Proportional to 513,210.60, 769,815.90 and 139,233.60

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Solution

The fourth proportional to 513,210.60, 769,815.90 and 139,233.60 is: 208,850.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,210.60 : 769,815.90 = 139,233.60 : x
  2. Step 2: Convert to fraction form
    513,210.60/769,815.90 = 139,233.60/x
  3. Step 3: Cross multiply
    513,210.60x = 769,815.90 × 139,233.60
  4. Step 4: Simplify right side
    513,210.60x = 107,184,239,094.24
  5. Step 5: Solve for x
    x = 107,184,239,094.24/513,210.60
  6. Step 6: Final answer
    x = 208,850.40

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Double scale
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Similar ratio
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1.5x scale

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.