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Finding the Fourth Proportional to 478,389.39, 717,566.14 and 118,561.43

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Solution

The fourth proportional to 478,389.39, 717,566.14 and 118,561.43 is: 177,837.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,389.39 : 717,566.14 = 118,561.43 : x
  2. Step 2: Convert to fraction form
    478,389.39/717,566.14 = 118,561.43/x
  3. Step 3: Cross multiply
    478,389.39x = 717,566.14 × 118,561.43
  4. Step 4: Simplify right side
    478,389.39x = 85,075,665,806.09
  5. Step 5: Solve for x
    x = 85,075,665,806.09/478,389.39
  6. Step 6: Final answer
    x = 177,837.69

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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.