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Finding the Fourth Proportional to 610.69, 842.75 and 345.18

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Solution

The fourth proportional to 610.69, 842.75 and 345.18 is: 476.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.69 : 842.75 = 345.18 : x
  2. Step 2: Convert to fraction form
    610.69/842.75 = 345.18/x
  3. Step 3: Cross multiply
    610.69x = 842.75 × 345.18
  4. Step 4: Simplify right side
    610.69x = 290,900.37
  5. Step 5: Solve for x
    x = 290,900.37/610.69
  6. Step 6: Final answer
    x = 476.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.