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Finding the Fourth Proportional to 721,940.69, 996,289.91 and 395,248.19

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Solution

The fourth proportional to 721,940.69, 996,289.91 and 395,248.19 is: 545,448.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,940.69 : 996,289.91 = 395,248.19 : x
  2. Step 2: Convert to fraction form
    721,940.69/996,289.91 = 395,248.19/x
  3. Step 3: Cross multiply
    721,940.69x = 996,289.91 × 395,248.19
  4. Step 4: Simplify right side
    721,940.69x = 393,781,782,937.65
  5. Step 5: Solve for x
    x = 393,781,782,937.65/721,940.69
  6. Step 6: Final answer
    x = 545,448.94

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1.5x scale

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.