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Finding the Fourth Proportional to 359,390.79, 538,553.66 and 145,899.05

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Solution

The fourth proportional to 359,390.79, 538,553.66 and 145,899.05 is: 218,632.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    359,390.79 : 538,553.66 = 145,899.05 : x
  2. Step 2: Convert to fraction form
    359,390.79/538,553.66 = 145,899.05/x
  3. Step 3: Cross multiply
    359,390.79x = 538,553.66 × 145,899.05
  4. Step 4: Simplify right side
    359,390.79x = 78,574,463,945.76
  5. Step 5: Solve for x
    x = 78,574,463,945.76/359,390.79
  6. Step 6: Final answer
    x = 218,632.38

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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.