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Finding the Fourth Proportional to 1,054.59, 1,581.47 and 437.98

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Solution

The fourth proportional to 1,054.59, 1,581.47 and 437.98 is: 656.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,054.59 : 1,581.47 = 437.98 : x
  2. Step 2: Convert to fraction form
    1,054.59/1,581.47 = 437.98/x
  3. Step 3: Cross multiply
    1,054.59x = 1,581.47 × 437.98
  4. Step 4: Simplify right side
    1,054.59x = 692,644.32
  5. Step 5: Solve for x
    x = 692,644.32/1,054.59
  6. Step 6: Final answer
    x = 656.79

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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.