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Finding the Fourth Proportional to 520,455.78, 780,683.67 and 165,469.77

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Solution

The fourth proportional to 520,455.78, 780,683.67 and 165,469.77 is: 248,204.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,455.78 : 780,683.67 = 165,469.77 : x
  2. Step 2: Convert to fraction form
    520,455.78/780,683.67 = 165,469.77/x
  3. Step 3: Cross multiply
    520,455.78x = 780,683.67 × 165,469.77
  4. Step 4: Simplify right side
    520,455.78x = 129,179,547,317.66
  5. Step 5: Solve for x
    x = 129,179,547,317.66/520,455.78
  6. Step 6: Final answer
    x = 248,204.66

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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.