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Finding the Fourth Proportional to 623.49, 860.60 and 374.77

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Solution

The fourth proportional to 623.49, 860.60 and 374.77 is: 517.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.49 : 860.60 = 374.77 : x
  2. Step 2: Convert to fraction form
    623.49/860.60 = 374.77/x
  3. Step 3: Cross multiply
    623.49x = 860.60 × 374.77
  4. Step 4: Simplify right side
    623.49x = 322,523.04
  5. Step 5: Solve for x
    x = 322,523.04/623.49
  6. Step 6: Final answer
    x = 517.29

Related Problems

Find fourth proportional to 311.75, 430.30 and 187.38
Half scale
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Double scale
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Similar ratio
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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.