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Finding the Fourth Proportional to 1,673.12, 2,509.38 and 618.74

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Solution

The fourth proportional to 1,673.12, 2,509.38 and 618.74 is: 928.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,673.12 : 2,509.38 = 618.74 : x
  2. Step 2: Convert to fraction form
    1,673.12/2,509.38 = 618.74/x
  3. Step 3: Cross multiply
    1,673.12x = 2,509.38 × 618.74
  4. Step 4: Simplify right side
    1,673.12x = 1,552,650.64
  5. Step 5: Solve for x
    x = 1,552,650.64/1,673.12
  6. Step 6: Final answer
    x = 928.00

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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.