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Finding the Fourth Proportional to 1,780.47, 2,670.78 and 610.50

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Solution

The fourth proportional to 1,780.47, 2,670.78 and 610.50 is: 915.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,780.47 : 2,670.78 = 610.50 : x
  2. Step 2: Convert to fraction form
    1,780.47/2,670.78 = 610.50/x
  3. Step 3: Cross multiply
    1,780.47x = 2,670.78 × 610.50
  4. Step 4: Simplify right side
    1,780.47x = 1,630,511.19
  5. Step 5: Solve for x
    x = 1,630,511.19/1,780.47
  6. Step 6: Final answer
    x = 915.78

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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.