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Finding the Fourth Proportional to 520,683.72, 780,466.68 and 220,911.36

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Solution

The fourth proportional to 520,683.72, 780,466.68 and 220,911.36 is: 331,129.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,683.72 : 780,466.68 = 220,911.36 : x
  2. Step 2: Convert to fraction form
    520,683.72/780,466.68 = 220,911.36/x
  3. Step 3: Cross multiply
    520,683.72x = 780,466.68 × 220,911.36
  4. Step 4: Simplify right side
    520,683.72x = 172,413,955,713.49
  5. Step 5: Solve for x
    x = 172,413,955,713.49/520,683.72
  6. Step 6: Final answer
    x = 331,129.91

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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.