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Finding the Fourth Proportional to 291,252.61, 436,878.51 and 91,590.49

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Solution

The fourth proportional to 291,252.61, 436,878.51 and 91,590.49 is: 137,385.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,252.61 : 436,878.51 = 91,590.49 : x
  2. Step 2: Convert to fraction form
    291,252.61/436,878.51 = 91,590.49/x
  3. Step 3: Cross multiply
    291,252.61x = 436,878.51 × 91,590.49
  4. Step 4: Simplify right side
    291,252.61x = 40,013,916,801.37
  5. Step 5: Solve for x
    x = 40,013,916,801.37/291,252.61
  6. Step 6: Final answer
    x = 137,385.61

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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.