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Finding the Fourth Proportional to 412,530.30, 618,709.05 and 202,319.10

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Solution

The fourth proportional to 412,530.30, 618,709.05 and 202,319.10 is: 303,436.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,530.30 : 618,709.05 = 202,319.10 : x
  2. Step 2: Convert to fraction form
    412,530.30/618,709.05 = 202,319.10/x
  3. Step 3: Cross multiply
    412,530.30x = 618,709.05 × 202,319.10
  4. Step 4: Simplify right side
    412,530.30x = 125,176,658,157.86
  5. Step 5: Solve for x
    x = 125,176,658,157.86/412,530.30
  6. Step 6: Final answer
    x = 303,436.28

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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.