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Finding the Fourth Proportional to 1,058.99, 1,588.65 and 328.40

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Solution

The fourth proportional to 1,058.99, 1,588.65 and 328.40 is: 492.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,058.99 : 1,588.65 = 328.40 : x
  2. Step 2: Convert to fraction form
    1,058.99/1,588.65 = 328.40/x
  3. Step 3: Cross multiply
    1,058.99x = 1,588.65 × 328.40
  4. Step 4: Simplify right side
    1,058.99x = 521,707.75
  5. Step 5: Solve for x
    x = 521,707.75/1,058.99
  6. Step 6: Final answer
    x = 492.65

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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.