Home / 3,123.63-4,310.91-1,779.51

Finding the Fourth Proportional to 3,123.63, 4,310.91 and 1,779.51

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Solution

The fourth proportional to 3,123.63, 4,310.91 and 1,779.51 is: 2,455.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123.63 : 4,310.91 = 1,779.51 : x
  2. Step 2: Convert to fraction form
    3,123.63/4,310.91 = 1,779.51/x
  3. Step 3: Cross multiply
    3,123.63x = 4,310.91 × 1,779.51
  4. Step 4: Simplify right side
    3,123.63x = 7,671,307.45
  5. Step 5: Solve for x
    x = 7,671,307.45/3,123.63
  6. Step 6: Final answer
    x = 2,455.90

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1.5x scale

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.