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Finding the Fourth Proportional to 408,598.04, 612,995.22 and 128,115.32

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Solution

The fourth proportional to 408,598.04, 612,995.22 and 128,115.32 is: 192,203.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,598.04 : 612,995.22 = 128,115.32 : x
  2. Step 2: Convert to fraction form
    408,598.04/612,995.22 = 128,115.32/x
  3. Step 3: Cross multiply
    408,598.04x = 612,995.22 × 128,115.32
  4. Step 4: Simplify right side
    408,598.04x = 78,534,078,768.77
  5. Step 5: Solve for x
    x = 78,534,078,768.77/408,598.04
  6. Step 6: Final answer
    x = 192,203.76

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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.