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Finding the Fourth Proportional to 297,640.98, 445,870.98 and 139,389.66

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Solution

The fourth proportional to 297,640.98, 445,870.98 and 139,389.66 is: 208,807.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,640.98 : 445,870.98 = 139,389.66 : x
  2. Step 2: Convert to fraction form
    297,640.98/445,870.98 = 139,389.66/x
  3. Step 3: Cross multiply
    297,640.98x = 445,870.98 × 139,389.66
  4. Step 4: Simplify right side
    297,640.98x = 62,149,804,306.07
  5. Step 5: Solve for x
    x = 62,149,804,306.07/297,640.98
  6. Step 6: Final answer
    x = 208,807.95

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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.