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Finding the Fourth Proportional to 1,123.58, 1,685.34 and 473.85

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Solution

The fourth proportional to 1,123.58, 1,685.34 and 473.85 is: 710.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,123.58 : 1,685.34 = 473.85 : x
  2. Step 2: Convert to fraction form
    1,123.58/1,685.34 = 473.85/x
  3. Step 3: Cross multiply
    1,123.58x = 1,685.34 × 473.85
  4. Step 4: Simplify right side
    1,123.58x = 798,598.36
  5. Step 5: Solve for x
    x = 798,598.36/1,123.58
  6. Step 6: Final answer
    x = 710.76

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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.