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Finding the Fourth Proportional to 478,161.50, 716,703.99 and 208,516.55

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Solution

The fourth proportional to 478,161.50, 716,703.99 and 208,516.55 is: 312,540.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,161.50 : 716,703.99 = 208,516.55 : x
  2. Step 2: Convert to fraction form
    478,161.50/716,703.99 = 208,516.55/x
  3. Step 3: Cross multiply
    478,161.50x = 716,703.99 × 208,516.55
  4. Step 4: Simplify right side
    478,161.50x = 149,444,639,782.52
  5. Step 5: Solve for x
    x = 149,444,639,782.52/478,161.50
  6. Step 6: Final answer
    x = 312,540.10

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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.