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Finding the Fourth Proportional to 1,038.88, 1,559.80 and 894.56

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Solution

The fourth proportional to 1,038.88, 1,559.80 and 894.56 is: 1,343.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,038.88 : 1,559.80 = 894.56 : x
  2. Step 2: Convert to fraction form
    1,038.88/1,559.80 = 894.56/x
  3. Step 3: Cross multiply
    1,038.88x = 1,559.80 × 894.56
  4. Step 4: Simplify right side
    1,038.88x = 1,395,334.69
  5. Step 5: Solve for x
    x = 1,395,334.69/1,038.88
  6. Step 6: Final answer
    x = 1,343.11

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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.