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Finding the Fourth Proportional to 388,364.36, 582,275.79 and 172,105.32

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Solution

The fourth proportional to 388,364.36, 582,275.79 and 172,105.32 is: 258,038.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,364.36 : 582,275.79 = 172,105.32 : x
  2. Step 2: Convert to fraction form
    388,364.36/582,275.79 = 172,105.32/x
  3. Step 3: Cross multiply
    388,364.36x = 582,275.79 × 172,105.32
  4. Step 4: Simplify right side
    388,364.36x = 100,212,763,349.74
  5. Step 5: Solve for x
    x = 100,212,763,349.74/388,364.36
  6. Step 6: Final answer
    x = 258,038.00

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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.