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Finding the Fourth Proportional to 1,875.57, 2,813.48 and 721.32

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Solution

The fourth proportional to 1,875.57, 2,813.48 and 721.32 is: 1,082.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,875.57 : 2,813.48 = 721.32 : x
  2. Step 2: Convert to fraction form
    1,875.57/2,813.48 = 721.32/x
  3. Step 3: Cross multiply
    1,875.57x = 2,813.48 × 721.32
  4. Step 4: Simplify right side
    1,875.57x = 2,029,415.79
  5. Step 5: Solve for x
    x = 2,029,415.79/1,875.57
  6. Step 6: Final answer
    x = 1,082.03

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1.5x scale

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.