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Finding the Fourth Proportional to 520,901.80, 781,395.90 and 165,905.80

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Solution

The fourth proportional to 520,901.80, 781,395.90 and 165,905.80 is: 248,872.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,901.80 : 781,395.90 = 165,905.80 : x
  2. Step 2: Convert to fraction form
    520,901.80/781,395.90 = 165,905.80/x
  3. Step 3: Cross multiply
    520,901.80x = 781,395.90 × 165,905.80
  4. Step 4: Simplify right side
    520,901.80x = 129,638,111,906.22
  5. Step 5: Solve for x
    x = 129,638,111,906.22/520,901.80
  6. Step 6: Final answer
    x = 248,872.46

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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.