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Finding the Fourth Proportional to 292,978.82, 439,510.32 and 90,590.68

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Solution

The fourth proportional to 292,978.82, 439,510.32 and 90,590.68 is: 135,899.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,978.82 : 439,510.32 = 90,590.68 : x
  2. Step 2: Convert to fraction form
    292,978.82/439,510.32 = 90,590.68/x
  3. Step 3: Cross multiply
    292,978.82x = 439,510.32 × 90,590.68
  4. Step 4: Simplify right side
    292,978.82x = 39,815,538,755.82
  5. Step 5: Solve for x
    x = 39,815,538,755.82/292,978.82
  6. Step 6: Final answer
    x = 135,899.03

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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.