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Finding the Fourth Proportional to 1,728.10, 2,590.47 and 741.17

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Solution

The fourth proportional to 1,728.10, 2,590.47 and 741.17 is: 1,111.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,728.10 : 2,590.47 = 741.17 : x
  2. Step 2: Convert to fraction form
    1,728.10/2,590.47 = 741.17/x
  3. Step 3: Cross multiply
    1,728.10x = 2,590.47 × 741.17
  4. Step 4: Simplify right side
    1,728.10x = 1,919,985.13
  5. Step 5: Solve for x
    x = 1,919,985.13/1,728.10
  6. Step 6: Final answer
    x = 1,111.04

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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.