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Finding the Fourth Proportional to 983.66, 1,475.70 and 325.50

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Solution

The fourth proportional to 983.66, 1,475.70 and 325.50 is: 488.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.66 : 1,475.70 = 325.50 : x
  2. Step 2: Convert to fraction form
    983.66/1,475.70 = 325.50/x
  3. Step 3: Cross multiply
    983.66x = 1,475.70 × 325.50
  4. Step 4: Simplify right side
    983.66x = 480,331.34
  5. Step 5: Solve for x
    x = 480,331.34/983.66
  6. Step 6: Final answer
    x = 488.31

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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.