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Finding the Fourth Proportional to 379,434.74, 569,174.39 and 142,779.47

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Solution

The fourth proportional to 379,434.74, 569,174.39 and 142,779.47 is: 214,177.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,434.74 : 569,174.39 = 142,779.47 : x
  2. Step 2: Convert to fraction form
    379,434.74/569,174.39 = 142,779.47/x
  3. Step 3: Cross multiply
    379,434.74x = 569,174.39 × 142,779.47
  4. Step 4: Simplify right side
    379,434.74x = 81,266,417,741.77
  5. Step 5: Solve for x
    x = 81,266,417,741.77/379,434.74
  6. Step 6: Final answer
    x = 214,177.59

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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.