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Finding the Fourth Proportional to 1,312.63, 1,811.23 and 752.99

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Solution

The fourth proportional to 1,312.63, 1,811.23 and 752.99 is: 1,039.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312.63 : 1,811.23 = 752.99 : x
  2. Step 2: Convert to fraction form
    1,312.63/1,811.23 = 752.99/x
  3. Step 3: Cross multiply
    1,312.63x = 1,811.23 × 752.99
  4. Step 4: Simplify right side
    1,312.63x = 1,363,827.14
  5. Step 5: Solve for x
    x = 1,363,827.14/1,312.63
  6. Step 6: Final answer
    x = 1,039.01

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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.