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Finding the Fourth Proportional to 692,319.98, 955,410.45 and 405,767.90

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Solution

The fourth proportional to 692,319.98, 955,410.45 and 405,767.90 is: 559,964.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,319.98 : 955,410.45 = 405,767.90 : x
  2. Step 2: Convert to fraction form
    692,319.98/955,410.45 = 405,767.90/x
  3. Step 3: Cross multiply
    692,319.98x = 955,410.45 × 405,767.90
  4. Step 4: Simplify right side
    692,319.98x = 387,674,891,934.56
  5. Step 5: Solve for x
    x = 387,674,891,934.56/692,319.98
  6. Step 6: Final answer
    x = 559,964.91

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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.