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Finding the Fourth Proportional to 660,879.40, 990,761.82 and 286,620.52

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Solution

The fourth proportional to 660,879.40, 990,761.82 and 286,620.52 is: 429,689.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,879.40 : 990,761.82 = 286,620.52 : x
  2. Step 2: Convert to fraction form
    660,879.40/990,761.82 = 286,620.52/x
  3. Step 3: Cross multiply
    660,879.40x = 990,761.82 × 286,620.52
  4. Step 4: Simplify right side
    660,879.40x = 283,972,668,044.55
  5. Step 5: Solve for x
    x = 283,972,668,044.55/660,879.40
  6. Step 6: Final answer
    x = 429,689.09

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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.