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Finding the Fourth Proportional to 1,071.12, 1,606.88 and 340.55

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Solution

The fourth proportional to 1,071.12, 1,606.88 and 340.55 is: 510.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,071.12 : 1,606.88 = 340.55 : x
  2. Step 2: Convert to fraction form
    1,071.12/1,606.88 = 340.55/x
  3. Step 3: Cross multiply
    1,071.12x = 1,606.88 × 340.55
  4. Step 4: Simplify right side
    1,071.12x = 547,221.83
  5. Step 5: Solve for x
    x = 547,221.83/1,071.12
  6. Step 6: Final answer
    x = 510.89

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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.