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Finding the Fourth Proportional to 352,718.55, 528,924.74 and 128,004.30

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Solution

The fourth proportional to 352,718.55, 528,924.74 and 128,004.30 is: 191,950.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,718.55 : 528,924.74 = 128,004.30 : x
  2. Step 2: Convert to fraction form
    352,718.55/528,924.74 = 128,004.30/x
  3. Step 3: Cross multiply
    352,718.55x = 528,924.74 × 128,004.30
  4. Step 4: Simplify right side
    352,718.55x = 67,704,640,456.36
  5. Step 5: Solve for x
    x = 67,704,640,456.36/352,718.55
  6. Step 6: Final answer
    x = 191,950.89

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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.