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Finding the Fourth Proportional to 677,463.60, 934,832.42 and 391,075.96

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Solution

The fourth proportional to 677,463.60, 934,832.42 and 391,075.96 is: 539,645.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,463.60 : 934,832.42 = 391,075.96 : x
  2. Step 2: Convert to fraction form
    677,463.60/934,832.42 = 391,075.96/x
  3. Step 3: Cross multiply
    677,463.60x = 934,832.42 × 391,075.96
  4. Step 4: Simplify right side
    677,463.60x = 365,590,486,090.62
  5. Step 5: Solve for x
    x = 365,590,486,090.62/677,463.60
  6. Step 6: Final answer
    x = 539,645.95

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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.