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Finding the Fourth Proportional to 721,957.98, 996,313.80 and 395,265.54

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Solution

The fourth proportional to 721,957.98, 996,313.80 and 395,265.54 is: 545,472.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,957.98 : 996,313.80 = 395,265.54 : x
  2. Step 2: Convert to fraction form
    721,957.98/996,313.80 = 395,265.54/x
  3. Step 3: Cross multiply
    721,957.98x = 996,313.80 × 395,265.54
  4. Step 4: Simplify right side
    721,957.98x = 393,808,512,166.45
  5. Step 5: Solve for x
    x = 393,808,512,166.45/721,957.98
  6. Step 6: Final answer
    x = 545,472.90

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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.