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Finding the Fourth Proportional to 713,845, 985,060.02 and 391,486.60

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Solution

The fourth proportional to 713,845, 985,060.02 and 391,486.60 is: 540,226.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,845 : 985,060.02 = 391,486.60 : x
  2. Step 2: Convert to fraction form
    713,845/985,060.02 = 391,486.60/x
  3. Step 3: Cross multiply
    713,845x = 985,060.02 × 391,486.60
  4. Step 4: Simplify right side
    713,845x = 385,637,798,025.73
  5. Step 5: Solve for x
    x = 385,637,798,025.73/713,845
  6. Step 6: Final answer
    x = 540,226.24

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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.