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Finding the Fourth Proportional to 623.95, 861.00 and 344.18

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Solution

The fourth proportional to 623.95, 861.00 and 344.18 is: 474.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.95 : 861.00 = 344.18 : x
  2. Step 2: Convert to fraction form
    623.95/861.00 = 344.18/x
  3. Step 3: Cross multiply
    623.95x = 861.00 × 344.18
  4. Step 4: Simplify right side
    623.95x = 296,341.99
  5. Step 5: Solve for x
    x = 296,341.99/623.95
  6. Step 6: Final answer
    x = 474.95

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Double scale
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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.