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Finding the Fourth Proportional to 1,325.82, 1,989.63 and 460.13

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Solution

The fourth proportional to 1,325.82, 1,989.63 and 460.13 is: 690.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,325.82 : 1,989.63 = 460.13 : x
  2. Step 2: Convert to fraction form
    1,325.82/1,989.63 = 460.13/x
  3. Step 3: Cross multiply
    1,325.82x = 1,989.63 × 460.13
  4. Step 4: Simplify right side
    1,325.82x = 915,478.50
  5. Step 5: Solve for x
    x = 915,478.50/1,325.82
  6. Step 6: Final answer
    x = 690.50

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Half scale
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Double scale
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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.