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Finding the Fourth Proportional to 708,802,900.16, 978,148,027.86 and 391,263,228.52

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Solution

The fourth proportional to 708,802,900.16, 978,148,027.86 and 391,263,228.52 is: 539,943,269.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,802,900.16 : 978,148,027.86 = 391,263,228.52 : x
  2. Step 2: Convert to fraction form
    708,802,900.16/978,148,027.86 = 391,263,228.52/x
  3. Step 3: Cross multiply
    708,802,900.16x = 978,148,027.86 × 391,263,228.52
  4. Step 4: Simplify right side
    708,802,900.16x = 382,713,355,350,974,464
  5. Step 5: Solve for x
    x = 382,713,355,350,974,464/708,802,900.16
  6. Step 6: Final answer
    x = 539,943,269.51

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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.