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Finding the Fourth Proportional to 359,285.21, 538,779.54 and 122,646.95

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Solution

The fourth proportional to 359,285.21, 538,779.54 and 122,646.95 is: 183,919.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    359,285.21 : 538,779.54 = 122,646.95 : x
  2. Step 2: Convert to fraction form
    359,285.21/538,779.54 = 122,646.95/x
  3. Step 3: Cross multiply
    359,285.21x = 538,779.54 × 122,646.95
  4. Step 4: Simplify right side
    359,285.21x = 66,079,667,303.40
  5. Step 5: Solve for x
    x = 66,079,667,303.40/359,285.21
  6. Step 6: Final answer
    x = 183,919.81

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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.