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Finding the Fourth Proportional to 351,745.10, 485,417.16 and 215,854.10

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Solution

The fourth proportional to 351,745.10, 485,417.16 and 215,854.10 is: 297,884.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,745.10 : 485,417.16 = 215,854.10 : x
  2. Step 2: Convert to fraction form
    351,745.10/485,417.16 = 215,854.10/x
  3. Step 3: Cross multiply
    351,745.10x = 485,417.16 × 215,854.10
  4. Step 4: Simplify right side
    351,745.10x = 104,779,284,196.36
  5. Step 5: Solve for x
    x = 104,779,284,196.36/351,745.10
  6. Step 6: Final answer
    x = 297,884.13

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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.