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Finding the Fourth Proportional to 641,540.70, 885,298.95 and 355,033.98

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Solution

The fourth proportional to 641,540.70, 885,298.95 and 355,033.98 is: 489,931.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,540.70 : 885,298.95 = 355,033.98 : x
  2. Step 2: Convert to fraction form
    641,540.70/885,298.95 = 355,033.98/x
  3. Step 3: Cross multiply
    641,540.70x = 885,298.95 × 355,033.98
  4. Step 4: Simplify right side
    641,540.70x = 314,311,209,708.32
  5. Step 5: Solve for x
    x = 314,311,209,708.32/641,540.70
  6. Step 6: Final answer
    x = 489,931.83

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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.