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Finding the Fourth Proportional to 519,223.40, 778,889.79 and 215,583.08

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Solution

The fourth proportional to 519,223.40, 778,889.79 and 215,583.08 is: 323,397.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,223.40 : 778,889.79 = 215,583.08 : x
  2. Step 2: Convert to fraction form
    519,223.40/778,889.79 = 215,583.08/x
  3. Step 3: Cross multiply
    519,223.40x = 778,889.79 × 215,583.08
  4. Step 4: Simplify right side
    519,223.40x = 167,915,459,908.75
  5. Step 5: Solve for x
    x = 167,915,459,908.75/519,223.40
  6. Step 6: Final answer
    x = 323,397.33

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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.