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Finding the Fourth Proportional to 710,015,429.76, 979,802,490.80 and 396,752,217.84

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Solution

The fourth proportional to 710,015,429.76, 979,802,490.80 and 396,752,217.84 is: 547,507,554.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,015,429.76 : 979,802,490.80 = 396,752,217.84 : x
  2. Step 2: Convert to fraction form
    710,015,429.76/979,802,490.80 = 396,752,217.84/x
  3. Step 3: Cross multiply
    710,015,429.76x = 979,802,490.80 × 396,752,217.84
  4. Step 4: Simplify right side
    710,015,429.76x = 388,738,811,270,056,128
  5. Step 5: Solve for x
    x = 388,738,811,270,056,128/710,015,429.76
  6. Step 6: Final answer
    x = 547,507,554.03

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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.