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Finding the Fourth Proportional to 291,149.94, 399,640.29 and 258,607.38

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Solution

The fourth proportional to 291,149.94, 399,640.29 and 258,607.38 is: 354,971.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,149.94 : 399,640.29 = 258,607.38 : x
  2. Step 2: Convert to fraction form
    291,149.94/399,640.29 = 258,607.38/x
  3. Step 3: Cross multiply
    291,149.94x = 399,640.29 × 258,607.38
  4. Step 4: Simplify right side
    291,149.94x = 103,349,928,339.34
  5. Step 5: Solve for x
    x = 103,349,928,339.34/291,149.94
  6. Step 6: Final answer
    x = 354,971.49

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.