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Finding the Fourth Proportional to 617,604.57, 851,617.50 and 402,345.45

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Solution

The fourth proportional to 617,604.57, 851,617.50 and 402,345.45 is: 554,795.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,604.57 : 851,617.50 = 402,345.45 : x
  2. Step 2: Convert to fraction form
    617,604.57/851,617.50 = 402,345.45/x
  3. Step 3: Cross multiply
    617,604.57x = 851,617.50 × 402,345.45
  4. Step 4: Simplify right side
    617,604.57x = 342,644,419,995.56
  5. Step 5: Solve for x
    x = 342,644,419,995.56/617,604.57
  6. Step 6: Final answer
    x = 554,795.80

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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.