Home / 4,758.18-7,139.32-1,985.40

Finding the Fourth Proportional to 4,758.18, 7,139.32 and 1,985.40

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Solution

The fourth proportional to 4,758.18, 7,139.32 and 1,985.40 is: 2,978.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,758.18 : 7,139.32 = 1,985.40 : x
  2. Step 2: Convert to fraction form
    4,758.18/7,139.32 = 1,985.40/x
  3. Step 3: Cross multiply
    4,758.18x = 7,139.32 × 1,985.40
  4. Step 4: Simplify right side
    4,758.18x = 14,174,405.93
  5. Step 5: Solve for x
    x = 14,174,405.93/4,758.18
  6. Step 6: Final answer
    x = 2,978.96

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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.