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Finding the Fourth Proportional to 1,060.43, 1,590.45 and 290.75

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Solution

The fourth proportional to 1,060.43, 1,590.45 and 290.75 is: 436.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,060.43 : 1,590.45 = 290.75 : x
  2. Step 2: Convert to fraction form
    1,060.43/1,590.45 = 290.75/x
  3. Step 3: Cross multiply
    1,060.43x = 1,590.45 × 290.75
  4. Step 4: Simplify right side
    1,060.43x = 462,423.34
  5. Step 5: Solve for x
    x = 462,423.34/1,060.43
  6. Step 6: Final answer
    x = 436.07

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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.