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Finding the Fourth Proportional to 719,388.62, 992,768.47 and 392,718.47

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Solution

The fourth proportional to 719,388.62, 992,768.47 and 392,718.47 is: 541,958.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,388.62 : 992,768.47 = 392,718.47 : x
  2. Step 2: Convert to fraction form
    719,388.62/992,768.47 = 392,718.47/x
  3. Step 3: Cross multiply
    719,388.62x = 992,768.47 × 392,718.47
  4. Step 4: Simplify right side
    719,388.62x = 389,878,516,102.77
  5. Step 5: Solve for x
    x = 389,878,516,102.77/719,388.62
  6. Step 6: Final answer
    x = 541,958.14

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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.