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Finding the Fourth Proportional to 518,661.50, 777,992.24 and 139,583.07

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Solution

The fourth proportional to 518,661.50, 777,992.24 and 139,583.07 is: 209,374.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,661.50 : 777,992.24 = 139,583.07 : x
  2. Step 2: Convert to fraction form
    518,661.50/777,992.24 = 139,583.07/x
  3. Step 3: Cross multiply
    518,661.50x = 777,992.24 × 139,583.07
  4. Step 4: Simplify right side
    518,661.50x = 108,594,547,832.44
  5. Step 5: Solve for x
    x = 108,594,547,832.44/518,661.50
  6. Step 6: Final answer
    x = 209,374.61

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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.