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Finding the Fourth Proportional to 1,039.24, 1,558.55 and 345.73

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Solution

The fourth proportional to 1,039.24, 1,558.55 and 345.73 is: 518.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,039.24 : 1,558.55 = 345.73 : x
  2. Step 2: Convert to fraction form
    1,039.24/1,558.55 = 345.73/x
  3. Step 3: Cross multiply
    1,039.24x = 1,558.55 × 345.73
  4. Step 4: Simplify right side
    1,039.24x = 538,837.49
  5. Step 5: Solve for x
    x = 538,837.49/1,039.24
  6. Step 6: Final answer
    x = 518.49

Related Problems

Find fourth proportional to 519.62, 779.28 and 172.87
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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.