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Finding the Fourth Proportional to 1,592.40, 2,389.56 and 618.48

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Solution

The fourth proportional to 1,592.40, 2,389.56 and 618.48 is: 928.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,592.40 : 2,389.56 = 618.48 : x
  2. Step 2: Convert to fraction form
    1,592.40/2,389.56 = 618.48/x
  3. Step 3: Cross multiply
    1,592.40x = 2,389.56 × 618.48
  4. Step 4: Simplify right side
    1,592.40x = 1,477,895.07
  5. Step 5: Solve for x
    x = 1,477,895.07/1,592.40
  6. Step 6: Final answer
    x = 928.09

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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.