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Finding the Fourth Proportional to 4,453.70, 6,638.99 and 4,386.12

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Solution

The fourth proportional to 4,453.70, 6,638.99 and 4,386.12 is: 6,538.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,453.70 : 6,638.99 = 4,386.12 : x
  2. Step 2: Convert to fraction form
    4,453.70/6,638.99 = 4,386.12/x
  3. Step 3: Cross multiply
    4,453.70x = 6,638.99 × 4,386.12
  4. Step 4: Simplify right side
    4,453.70x = 29,119,384.89
  5. Step 5: Solve for x
    x = 29,119,384.89/4,453.70
  6. Step 6: Final answer
    x = 6,538.25

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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 (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.