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Finding the Fourth Proportional to 1,053.47, 1,579.31 and 436.79

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Solution

The fourth proportional to 1,053.47, 1,579.31 and 436.79 is: 654.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,053.47 : 1,579.31 = 436.79 : x
  2. Step 2: Convert to fraction form
    1,053.47/1,579.31 = 436.79/x
  3. Step 3: Cross multiply
    1,053.47x = 1,579.31 × 436.79
  4. Step 4: Simplify right side
    1,053.47x = 689,816.73
  5. Step 5: Solve for x
    x = 689,816.73/1,053.47
  6. Step 6: Final answer
    x = 654.81

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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.