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Finding the Fourth Proportional to 1,670.51, 2,505.70 and 437.91

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Solution

The fourth proportional to 1,670.51, 2,505.70 and 437.91 is: 656.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,670.51 : 2,505.70 = 437.91 : x
  2. Step 2: Convert to fraction form
    1,670.51/2,505.70 = 437.91/x
  3. Step 3: Cross multiply
    1,670.51x = 2,505.70 × 437.91
  4. Step 4: Simplify right side
    1,670.51x = 1,097,271.09
  5. Step 5: Solve for x
    x = 1,097,271.09/1,670.51
  6. Step 6: Final answer
    x = 656.85

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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.