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Finding the Fourth Proportional to 1,372.65, 1,881.55 and 1,354.20

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Solution

The fourth proportional to 1,372.65, 1,881.55 and 1,354.20 is: 1,856.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,372.65 : 1,881.55 = 1,354.20 : x
  2. Step 2: Convert to fraction form
    1,372.65/1,881.55 = 1,354.20/x
  3. Step 3: Cross multiply
    1,372.65x = 1,881.55 × 1,354.20
  4. Step 4: Simplify right side
    1,372.65x = 2,547,995.01
  5. Step 5: Solve for x
    x = 2,547,995.01/1,372.65
  6. Step 6: Final answer
    x = 1,856.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.