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Finding the Fourth Proportional to 1,689.82, 2,534.90 and 457.25

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Solution

The fourth proportional to 1,689.82, 2,534.90 and 457.25 is: 685.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,689.82 : 2,534.90 = 457.25 : x
  2. Step 2: Convert to fraction form
    1,689.82/2,534.90 = 457.25/x
  3. Step 3: Cross multiply
    1,689.82x = 2,534.90 × 457.25
  4. Step 4: Simplify right side
    1,689.82x = 1,159,068.06
  5. Step 5: Solve for x
    x = 1,159,068.06/1,689.82
  6. Step 6: Final answer
    x = 685.91

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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.