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Finding the Fourth Proportional to 663,786, 916,093.80 and 409,130.64

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Solution

The fourth proportional to 663,786, 916,093.80 and 409,130.64 is: 564,642.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,786 : 916,093.80 = 409,130.64 : x
  2. Step 2: Convert to fraction form
    663,786/916,093.80 = 409,130.64/x
  3. Step 3: Cross multiply
    663,786x = 916,093.80 × 409,130.64
  4. Step 4: Simplify right side
    663,786x = 374,802,042,694.03
  5. Step 5: Solve for x
    x = 374,802,042,694.03/663,786
  6. Step 6: Final answer
    x = 564,642.89

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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.