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Finding the Fourth Proportional to 402,488.40, 603,732.60 and 121,969.20

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Solution

The fourth proportional to 402,488.40, 603,732.60 and 121,969.20 is: 182,953.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,488.40 : 603,732.60 = 121,969.20 : x
  2. Step 2: Convert to fraction form
    402,488.40/603,732.60 = 121,969.20/x
  3. Step 3: Cross multiply
    402,488.40x = 603,732.60 × 121,969.20
  4. Step 4: Simplify right side
    402,488.40x = 73,636,782,235.92
  5. Step 5: Solve for x
    x = 73,636,782,235.92/402,488.40
  6. Step 6: Final answer
    x = 182,953.80

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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.