Home / 1,323.49-1,985.24-399.05

Finding the Fourth Proportional to 1,323.49, 1,985.24 and 399.05

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Solution

The fourth proportional to 1,323.49, 1,985.24 and 399.05 is: 598.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,323.49 : 1,985.24 = 399.05 : x
  2. Step 2: Convert to fraction form
    1,323.49/1,985.24 = 399.05/x
  3. Step 3: Cross multiply
    1,323.49x = 1,985.24 × 399.05
  4. Step 4: Simplify right side
    1,323.49x = 792,210.02
  5. Step 5: Solve for x
    x = 792,210.02/1,323.49
  6. Step 6: Final answer
    x = 598.58

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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.