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Finding the Fourth Proportional to 1,153.13, 1,728.75 and 503.40

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Solution

The fourth proportional to 1,153.13, 1,728.75 and 503.40 is: 754.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,153.13 : 1,728.75 = 503.40 : x
  2. Step 2: Convert to fraction form
    1,153.13/1,728.75 = 503.40/x
  3. Step 3: Cross multiply
    1,153.13x = 1,728.75 × 503.40
  4. Step 4: Simplify right side
    1,153.13x = 870,252.75
  5. Step 5: Solve for x
    x = 870,252.75/1,153.13
  6. Step 6: Final answer
    x = 754.69

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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.