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Finding the Fourth Proportional to 1,689.96, 2,534.93 and 457.49

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Solution

The fourth proportional to 1,689.96, 2,534.93 and 457.49 is: 686.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,689.96 : 2,534.93 = 457.49 : x
  2. Step 2: Convert to fraction form
    1,689.96/2,534.93 = 457.49/x
  3. Step 3: Cross multiply
    1,689.96x = 2,534.93 × 457.49
  4. Step 4: Simplify right side
    1,689.96x = 1,159,690.16
  5. Step 5: Solve for x
    x = 1,159,690.16/1,689.96
  6. Step 6: Final answer
    x = 686.22

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Double scale
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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.