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Finding the Fourth Proportional to 1,772.89, 2,657.16 and 784.64

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Solution

The fourth proportional to 1,772.89, 2,657.16 and 784.64 is: 1,176.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,772.89 : 2,657.16 = 784.64 : x
  2. Step 2: Convert to fraction form
    1,772.89/2,657.16 = 784.64/x
  3. Step 3: Cross multiply
    1,772.89x = 2,657.16 × 784.64
  4. Step 4: Simplify right side
    1,772.89x = 2,084,920.67
  5. Step 5: Solve for x
    x = 2,084,920.67/1,772.89
  6. Step 6: Final answer
    x = 1,176.00

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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.