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Finding the Fourth Proportional to 479,643.39, 719,339.78 and 142,593.28

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Solution

The fourth proportional to 479,643.39, 719,339.78 and 142,593.28 is: 213,852.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,643.39 : 719,339.78 = 142,593.28 : x
  2. Step 2: Convert to fraction form
    479,643.39/719,339.78 = 142,593.28/x
  3. Step 3: Cross multiply
    479,643.39x = 719,339.78 × 142,593.28
  4. Step 4: Simplify right side
    479,643.39x = 102,573,017,222.81
  5. Step 5: Solve for x
    x = 102,573,017,222.81/479,643.39
  6. Step 6: Final answer
    x = 213,852.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.