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Finding the Fourth Proportional to 977.50, 1,466.45 and 319.44

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Solution

The fourth proportional to 977.50, 1,466.45 and 319.44 is: 479.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    977.50 : 1,466.45 = 319.44 : x
  2. Step 2: Convert to fraction form
    977.50/1,466.45 = 319.44/x
  3. Step 3: Cross multiply
    977.50x = 1,466.45 × 319.44
  4. Step 4: Simplify right side
    977.50x = 468,441.19
  5. Step 5: Solve for x
    x = 468,441.19/977.50
  6. Step 6: Final answer
    x = 479.23

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Double scale
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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.