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Finding the Fourth Proportional to 692,320.98, 955,411.83 and 405,768.90

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Solution

The fourth proportional to 692,320.98, 955,411.83 and 405,768.90 is: 559,966.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,320.98 : 955,411.83 = 405,768.90 : x
  2. Step 2: Convert to fraction form
    692,320.98/955,411.83 = 405,768.90/x
  3. Step 3: Cross multiply
    692,320.98x = 955,411.83 × 405,768.90
  4. Step 4: Simplify right side
    692,320.98x = 387,676,407,306.09
  5. Step 5: Solve for x
    x = 387,676,407,306.09/692,320.98
  6. Step 6: Final answer
    x = 559,966.29

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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.