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Finding the Fourth Proportional to 713,968.60, 985,272.66 and 391,670.44

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Solution

The fourth proportional to 713,968.60, 985,272.66 and 391,670.44 is: 540,503.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,968.60 : 985,272.66 = 391,670.44 : x
  2. Step 2: Convert to fraction form
    713,968.60/985,272.66 = 391,670.44/x
  3. Step 3: Cross multiply
    713,968.60x = 985,272.66 × 391,670.44
  4. Step 4: Simplify right side
    713,968.60x = 385,902,176,262.17
  5. Step 5: Solve for x
    x = 385,902,176,262.17/713,968.60
  6. Step 6: Final answer
    x = 540,503.01

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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.