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Finding the Fourth Proportional to 638,925.30, 881,705.97 and 352,472.82

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Solution

The fourth proportional to 638,925.30, 881,705.97 and 352,472.82 is: 486,406.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,925.30 : 881,705.97 = 352,472.82 : x
  2. Step 2: Convert to fraction form
    638,925.30/881,705.97 = 352,472.82/x
  3. Step 3: Cross multiply
    638,925.30x = 881,705.97 × 352,472.82
  4. Step 4: Simplify right side
    638,925.30x = 310,777,389,656.74
  5. Step 5: Solve for x
    x = 310,777,389,656.74/638,925.30
  6. Step 6: Final answer
    x = 486,406.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.