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Finding the Fourth Proportional to 710,014,019.51, 979,800,551.61 and 396,750,807.65

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Solution

The fourth proportional to 710,014,019.51, 979,800,551.61 and 396,750,807.65 is: 547,505,611.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,014,019.51 : 979,800,551.61 = 396,750,807.65 : x
  2. Step 2: Convert to fraction form
    710,014,019.51/979,800,551.61 = 396,750,807.65/x
  3. Step 3: Cross multiply
    710,014,019.51x = 979,800,551.61 × 396,750,807.65
  4. Step 4: Simplify right side
    710,014,019.51x = 388,736,660,188,144,704
  5. Step 5: Solve for x
    x = 388,736,660,188,144,704/710,014,019.51
  6. Step 6: Final answer
    x = 547,505,611.87

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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.