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Finding the Fourth Proportional to 720,567.15, 994,365.32 and 393,865.50

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Solution

The fourth proportional to 720,567.15, 994,365.32 and 393,865.50 is: 543,524.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,567.15 : 994,365.32 = 393,865.50 : x
  2. Step 2: Convert to fraction form
    720,567.15/994,365.32 = 393,865.50/x
  3. Step 3: Cross multiply
    720,567.15x = 994,365.32 × 393,865.50
  4. Step 4: Simplify right side
    720,567.15x = 391,646,194,929.12
  5. Step 5: Solve for x
    x = 391,646,194,929.12/720,567.15
  6. Step 6: Final answer
    x = 543,524.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.