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Finding the Fourth Proportional to 1,407.87, 2,111.85 and 586.17

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Solution

The fourth proportional to 1,407.87, 2,111.85 and 586.17 is: 879.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,407.87 : 2,111.85 = 586.17 : x
  2. Step 2: Convert to fraction form
    1,407.87/2,111.85 = 586.17/x
  3. Step 3: Cross multiply
    1,407.87x = 2,111.85 × 586.17
  4. Step 4: Simplify right side
    1,407.87x = 1,237,903.11
  5. Step 5: Solve for x
    x = 1,237,903.11/1,407.87
  6. Step 6: Final answer
    x = 879.27

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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.