Home / 1,539.91-2,312.30-1,216.72

Finding the Fourth Proportional to 1,539.91, 2,312.30 and 1,216.72

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Solution

The fourth proportional to 1,539.91, 2,312.30 and 1,216.72 is: 1,827.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,539.91 : 2,312.30 = 1,216.72 : x
  2. Step 2: Convert to fraction form
    1,539.91/2,312.30 = 1,216.72/x
  3. Step 3: Cross multiply
    1,539.91x = 2,312.30 × 1,216.72
  4. Step 4: Simplify right side
    1,539.91x = 2,813,421.66
  5. Step 5: Solve for x
    x = 2,813,421.66/1,539.91
  6. Step 6: Final answer
    x = 1,827.00

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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.