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Finding the Fourth Proportional to 1,059.90, 1,590.16 and 329.60

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Solution

The fourth proportional to 1,059.90, 1,590.16 and 329.60 is: 494.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,059.90 : 1,590.16 = 329.60 : x
  2. Step 2: Convert to fraction form
    1,059.90/1,590.16 = 329.60/x
  3. Step 3: Cross multiply
    1,059.90x = 1,590.16 × 329.60
  4. Step 4: Simplify right side
    1,059.90x = 524,116.74
  5. Step 5: Solve for x
    x = 524,116.74/1,059.90
  6. Step 6: Final answer
    x = 494.50

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1.5x scale

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.