Home / 1,284.89-1,928.01-554.40

Finding the Fourth Proportional to 1,284.89, 1,928.01 and 554.40

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Solution

The fourth proportional to 1,284.89, 1,928.01 and 554.40 is: 831.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,284.89 : 1,928.01 = 554.40 : x
  2. Step 2: Convert to fraction form
    1,284.89/1,928.01 = 554.40/x
  3. Step 3: Cross multiply
    1,284.89x = 1,928.01 × 554.40
  4. Step 4: Simplify right side
    1,284.89x = 1,068,888.74
  5. Step 5: Solve for x
    x = 1,068,888.74/1,284.89
  6. Step 6: Final answer
    x = 831.89

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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.