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Finding the Fourth Proportional to 478,986.50, 718,601.79 and 142,039.46

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Solution

The fourth proportional to 478,986.50, 718,601.79 and 142,039.46 is: 213,095.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,986.50 : 718,601.79 = 142,039.46 : x
  2. Step 2: Convert to fraction form
    478,986.50/718,601.79 = 142,039.46/x
  3. Step 3: Cross multiply
    478,986.50x = 718,601.79 × 142,039.46
  4. Step 4: Simplify right side
    478,986.50x = 102,069,810,206.63
  5. Step 5: Solve for x
    x = 102,069,810,206.63/478,986.50
  6. Step 6: Final answer
    x = 213,095.38

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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.