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Finding the Fourth Proportional to 667,388.84, 920,258.62 and 425,287.94

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Solution

The fourth proportional to 667,388.84, 920,258.62 and 425,287.94 is: 586,427.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,388.84 : 920,258.62 = 425,287.94 : x
  2. Step 2: Convert to fraction form
    667,388.84/920,258.62 = 425,287.94/x
  3. Step 3: Cross multiply
    667,388.84x = 920,258.62 × 425,287.94
  4. Step 4: Simplify right side
    667,388.84x = 391,374,887,102.53
  5. Step 5: Solve for x
    x = 391,374,887,102.53/667,388.84
  6. Step 6: Final answer
    x = 586,427.08

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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.