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Finding the Fourth Proportional to 901.77, 1,244.44 and 487.77

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Solution

The fourth proportional to 901.77, 1,244.44 and 487.77 is: 673.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.77 : 1,244.44 = 487.77 : x
  2. Step 2: Convert to fraction form
    901.77/1,244.44 = 487.77/x
  3. Step 3: Cross multiply
    901.77x = 1,244.44 × 487.77
  4. Step 4: Simplify right side
    901.77x = 607,000.50
  5. Step 5: Solve for x
    x = 607,000.50/901.77
  6. Step 6: Final answer
    x = 673.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.