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Finding the Fourth Proportional to 478,998.37, 718,288.93 and 137,366.34

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Solution

The fourth proportional to 478,998.37, 718,288.93 and 137,366.34 is: 205,989.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,998.37 : 718,288.93 = 137,366.34 : x
  2. Step 2: Convert to fraction form
    478,998.37/718,288.93 = 137,366.34/x
  3. Step 3: Cross multiply
    478,998.37x = 718,288.93 × 137,366.34
  4. Step 4: Simplify right side
    478,998.37x = 98,668,721,376.62
  5. Step 5: Solve for x
    x = 98,668,721,376.62/478,998.37
  6. Step 6: Final answer
    x = 205,989.68

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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.