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Finding the Fourth Proportional to 641,428,754.80, 885,171,681.67 and 348,073,322.80

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Solution

The fourth proportional to 641,428,754.80, 885,171,681.67 and 348,073,322.80 is: 480,341,185.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,428,754.80 : 885,171,681.67 = 348,073,322.80 : x
  2. Step 2: Convert to fraction form
    641,428,754.80/885,171,681.67 = 348,073,322.80/x
  3. Step 3: Cross multiply
    641,428,754.80x = 885,171,681.67 × 348,073,322.80
  4. Step 4: Simplify right side
    641,428,754.80x = 308,104,648,487,340,736
  5. Step 5: Solve for x
    x = 308,104,648,487,340,736/641,428,754.80
  6. Step 6: Final answer
    x = 480,341,185.49

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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.