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Finding the Fourth Proportional to 901.70, 1,244.35 and 487.70

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Solution

The fourth proportional to 901.70, 1,244.35 and 487.70 is: 673.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.70 : 1,244.35 = 487.70 : x
  2. Step 2: Convert to fraction form
    901.70/1,244.35 = 487.70/x
  3. Step 3: Cross multiply
    901.70x = 1,244.35 × 487.70
  4. Step 4: Simplify right side
    901.70x = 606,869.50
  5. Step 5: Solve for x
    x = 606,869.50/901.70
  6. Step 6: Final answer
    x = 673.03

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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.