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Finding the Fourth Proportional to 697,071.21, 961,880.20 and 391,083.94

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Solution

The fourth proportional to 697,071.21, 961,880.20 and 391,083.94 is: 539,652.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    697,071.21 : 961,880.20 = 391,083.94 : x
  2. Step 2: Convert to fraction form
    697,071.21/961,880.20 = 391,083.94/x
  3. Step 3: Cross multiply
    697,071.21x = 961,880.20 × 391,083.94
  4. Step 4: Simplify right side
    697,071.21x = 376,175,896,468.57
  5. Step 5: Solve for x
    x = 376,175,896,468.57/697,071.21
  6. Step 6: Final answer
    x = 539,652.03

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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.