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Finding the Fourth Proportional to 521,479.44, 719,641.92 and 283,015.44

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Solution

The fourth proportional to 521,479.44, 719,641.92 and 283,015.44 is: 390,561.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,479.44 : 719,641.92 = 283,015.44 : x
  2. Step 2: Convert to fraction form
    521,479.44/719,641.92 = 283,015.44/x
  3. Step 3: Cross multiply
    521,479.44x = 719,641.92 × 283,015.44
  4. Step 4: Simplify right side
    521,479.44x = 203,669,774,631.25
  5. Step 5: Solve for x
    x = 203,669,774,631.25/521,479.44
  6. Step 6: Final answer
    x = 390,561.47

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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.