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Finding the Fourth Proportional to 384,520.01, 530,621.56 and 221,164.10

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Solution

The fourth proportional to 384,520.01, 530,621.56 and 221,164.10 is: 305,197.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,520.01 : 530,621.56 = 221,164.10 : x
  2. Step 2: Convert to fraction form
    384,520.01/530,621.56 = 221,164.10/x
  3. Step 3: Cross multiply
    384,520.01x = 530,621.56 × 221,164.10
  4. Step 4: Simplify right side
    384,520.01x = 117,354,437,256.78
  5. Step 5: Solve for x
    x = 117,354,437,256.78/384,520.01
  6. Step 6: Final answer
    x = 305,197.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.