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Finding the Fourth Proportional to 889.51, 1,334.49 and 402.43

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Solution

The fourth proportional to 889.51, 1,334.49 and 402.43 is: 603.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.51 : 1,334.49 = 402.43 : x
  2. Step 2: Convert to fraction form
    889.51/1,334.49 = 402.43/x
  3. Step 3: Cross multiply
    889.51x = 1,334.49 × 402.43
  4. Step 4: Simplify right side
    889.51x = 537,038.81
  5. Step 5: Solve for x
    x = 537,038.81/889.51
  6. Step 6: Final answer
    x = 603.75

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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.