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Finding the Fourth Proportional to 1,670.61, 2,505.54 and 630.72

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Solution

The fourth proportional to 1,670.61, 2,505.54 and 630.72 is: 945.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,670.61 : 2,505.54 = 630.72 : x
  2. Step 2: Convert to fraction form
    1,670.61/2,505.54 = 630.72/x
  3. Step 3: Cross multiply
    1,670.61x = 2,505.54 × 630.72
  4. Step 4: Simplify right side
    1,670.61x = 1,580,291.04
  5. Step 5: Solve for x
    x = 1,580,291.04/1,670.61
  6. Step 6: Final answer
    x = 945.94

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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.