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Finding the Fourth Proportional to 617,607, 851,620.86 and 402,347.88

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Solution

The fourth proportional to 617,607, 851,620.86 and 402,347.88 is: 554,799.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,607 : 851,620.86 = 402,347.88 : x
  2. Step 2: Convert to fraction form
    617,607/851,620.86 = 402,347.88/x
  3. Step 3: Cross multiply
    617,607x = 851,620.86 × 402,347.88
  4. Step 4: Simplify right side
    617,607x = 342,647,847,584.78
  5. Step 5: Solve for x
    x = 342,647,847,584.78/617,607
  6. Step 6: Final answer
    x = 554,799.16

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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.