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Finding the Fourth Proportional to 520,324.40, 780,320.50 and 165,255.36

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Solution

The fourth proportional to 520,324.40, 780,320.50 and 165,255.36 is: 247,830.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,324.40 : 780,320.50 = 165,255.36 : x
  2. Step 2: Convert to fraction form
    520,324.40/780,320.50 = 165,255.36/x
  3. Step 3: Cross multiply
    520,324.40x = 780,320.50 × 165,255.36
  4. Step 4: Simplify right side
    520,324.40x = 128,952,145,142.88
  5. Step 5: Solve for x
    x = 128,952,145,142.88/520,324.40
  6. Step 6: Final answer
    x = 247,830.29

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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.