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Finding the Fourth Proportional to 611.05, 842.98 and 424.99

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Solution

The fourth proportional to 611.05, 842.98 and 424.99 is: 586.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.05 : 842.98 = 424.99 : x
  2. Step 2: Convert to fraction form
    611.05/842.98 = 424.99/x
  3. Step 3: Cross multiply
    611.05x = 842.98 × 424.99
  4. Step 4: Simplify right side
    611.05x = 358,258.07
  5. Step 5: Solve for x
    x = 358,258.07/611.05
  6. Step 6: Final answer
    x = 586.30

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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.