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Finding the Fourth Proportional to 1,130.48, 1,696.36 and 553.84

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Solution

The fourth proportional to 1,130.48, 1,696.36 and 553.84 is: 831.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,130.48 : 1,696.36 = 553.84 : x
  2. Step 2: Convert to fraction form
    1,130.48/1,696.36 = 553.84/x
  3. Step 3: Cross multiply
    1,130.48x = 1,696.36 × 553.84
  4. Step 4: Simplify right side
    1,130.48x = 939,512.02
  5. Step 5: Solve for x
    x = 939,512.02/1,130.48
  6. Step 6: Final answer
    x = 831.07

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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.