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Finding the Fourth Proportional to 1,283.77, 1,925.25 and 553.15

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Solution

The fourth proportional to 1,283.77, 1,925.25 and 553.15 is: 829.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,283.77 : 1,925.25 = 553.15 : x
  2. Step 2: Convert to fraction form
    1,283.77/1,925.25 = 553.15/x
  3. Step 3: Cross multiply
    1,283.77x = 1,925.25 × 553.15
  4. Step 4: Simplify right side
    1,283.77x = 1,064,952.04
  5. Step 5: Solve for x
    x = 1,064,952.04/1,283.77
  6. Step 6: Final answer
    x = 829.55

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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.