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Finding the Fourth Proportional to 359,087.40, 538,635.78 and 172,055.16

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Solution

The fourth proportional to 359,087.40, 538,635.78 and 172,055.16 is: 258,084.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    359,087.40 : 538,635.78 = 172,055.16 : x
  2. Step 2: Convert to fraction form
    359,087.40/538,635.78 = 172,055.16/x
  3. Step 3: Cross multiply
    359,087.40x = 538,635.78 × 172,055.16
  4. Step 4: Simplify right side
    359,087.40x = 92,675,065,309.62
  5. Step 5: Solve for x
    x = 92,675,065,309.62/359,087.40
  6. Step 6: Final answer
    x = 258,084.98

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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.