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Finding the Fourth Proportional to 1,057.99, 1,587.03 and 472.89

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Solution

The fourth proportional to 1,057.99, 1,587.03 and 472.89 is: 709.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,057.99 : 1,587.03 = 472.89 : x
  2. Step 2: Convert to fraction form
    1,057.99/1,587.03 = 472.89/x
  3. Step 3: Cross multiply
    1,057.99x = 1,587.03 × 472.89
  4. Step 4: Simplify right side
    1,057.99x = 750,490.62
  5. Step 5: Solve for x
    x = 750,490.62/1,057.99
  6. Step 6: Final answer
    x = 709.36

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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.