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Finding the Fourth Proportional to 1,070.99, 1,605.24 and 454.49

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Solution

The fourth proportional to 1,070.99, 1,605.24 and 454.49 is: 681.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,070.99 : 1,605.24 = 454.49 : x
  2. Step 2: Convert to fraction form
    1,070.99/1,605.24 = 454.49/x
  3. Step 3: Cross multiply
    1,070.99x = 1,605.24 × 454.49
  4. Step 4: Simplify right side
    1,070.99x = 729,565.53
  5. Step 5: Solve for x
    x = 729,565.53/1,070.99
  6. Step 6: Final answer
    x = 681.21

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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.