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Finding the Fourth Proportional to 931,039,257.15, 1,394,978,455.62 and 561,798,315

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Solution

The fourth proportional to 931,039,257.15, 1,394,978,455.62 and 561,798,315 is: 841,743,825.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    931,039,257.15 : 1,394,978,455.62 = 561,798,315 : x
  2. Step 2: Convert to fraction form
    931,039,257.15/1,394,978,455.62 = 561,798,315/x
  3. Step 3: Cross multiply
    931,039,257.15x = 1,394,978,455.62 × 561,798,315
  4. Step 4: Simplify right side
    931,039,257.15x = 783,696,545,828,618,240
  5. Step 5: Solve for x
    x = 783,696,545,828,618,240/931,039,257.15
  6. Step 6: Final answer
    x = 841,743,825.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.