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Finding the Fourth Proportional to 408,605.04, 613,005.72 and 128,122.32

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Solution

The fourth proportional to 408,605.04, 613,005.72 and 128,122.32 is: 192,214.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,605.04 : 613,005.72 = 128,122.32 : x
  2. Step 2: Convert to fraction form
    408,605.04/613,005.72 = 128,122.32/x
  3. Step 3: Cross multiply
    408,605.04x = 613,005.72 × 128,122.32
  4. Step 4: Simplify right side
    408,605.04x = 78,539,715,019.67
  5. Step 5: Solve for x
    x = 78,539,715,019.67/408,605.04
  6. Step 6: Final answer
    x = 192,214.26

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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.