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Finding the Fourth Proportional to 528,081.90, 792,900.45 and 409,886.70

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Solution

The fourth proportional to 528,081.90, 792,900.45 and 409,886.70 is: 615,433.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,081.90 : 792,900.45 = 409,886.70 : x
  2. Step 2: Convert to fraction form
    528,081.90/792,900.45 = 409,886.70/x
  3. Step 3: Cross multiply
    528,081.90x = 792,900.45 × 409,886.70
  4. Step 4: Simplify right side
    528,081.90x = 324,999,348,879.02
  5. Step 5: Solve for x
    x = 324,999,348,879.02/528,081.90
  6. Step 6: Final answer
    x = 615,433.61

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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.