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Finding the Fourth Proportional to 907,879.49, 1,359,978.48 and 420,877.11

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Solution

The fourth proportional to 907,879.49, 1,359,978.48 and 420,877.11 is: 630,462.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    907,879.49 : 1,359,978.48 = 420,877.11 : x
  2. Step 2: Convert to fraction form
    907,879.49/1,359,978.48 = 420,877.11/x
  3. Step 3: Cross multiply
    907,879.49x = 1,359,978.48 × 420,877.11
  4. Step 4: Simplify right side
    907,879.49x = 572,383,812,324.59
  5. Step 5: Solve for x
    x = 572,383,812,324.59/907,879.49
  6. Step 6: Final answer
    x = 630,462.33

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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.