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Finding the Fourth Proportional to 692,317.98, 955,407.69 and 405,765.90

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Solution

The fourth proportional to 692,317.98, 955,407.69 and 405,765.90 is: 559,962.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,317.98 : 955,407.69 = 405,765.90 : x
  2. Step 2: Convert to fraction form
    692,317.98/955,407.69 = 405,765.90/x
  3. Step 3: Cross multiply
    692,317.98x = 955,407.69 × 405,765.90
  4. Step 4: Simplify right side
    692,317.98x = 387,671,861,199.77
  5. Step 5: Solve for x
    x = 387,671,861,199.77/692,317.98
  6. Step 6: Final answer
    x = 559,962.15

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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.