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Finding the Fourth Proportional to 351,970.65, 528,054.40 and 115,479.40

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Solution

The fourth proportional to 351,970.65, 528,054.40 and 115,479.40 is: 173,251.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,970.65 : 528,054.40 = 115,479.40 : x
  2. Step 2: Convert to fraction form
    351,970.65/528,054.40 = 115,479.40/x
  3. Step 3: Cross multiply
    351,970.65x = 528,054.40 × 115,479.40
  4. Step 4: Simplify right side
    351,970.65x = 60,979,405,279.36
  5. Step 5: Solve for x
    x = 60,979,405,279.36/351,970.65
  6. Step 6: Final answer
    x = 173,251.39

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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.