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Finding the Fourth Proportional to 478,812.55, 718,323.91 and 141,879.57

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Solution

The fourth proportional to 478,812.55, 718,323.91 and 141,879.57 is: 212,850.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,812.55 : 718,323.91 = 141,879.57 : x
  2. Step 2: Convert to fraction form
    478,812.55/718,323.91 = 141,879.57/x
  3. Step 3: Cross multiply
    478,812.55x = 718,323.91 × 141,879.57
  4. Step 4: Simplify right side
    478,812.55x = 101,915,490,683.48
  5. Step 5: Solve for x
    x = 101,915,490,683.48/478,812.55
  6. Step 6: Final answer
    x = 212,850.50

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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.