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Finding the Fourth Proportional to 901.20, 1,245 and 714.10

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Solution

The fourth proportional to 901.20, 1,245 and 714.10 is: 986.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.20 : 1,245 = 714.10 : x
  2. Step 2: Convert to fraction form
    901.20/1,245 = 714.10/x
  3. Step 3: Cross multiply
    901.20x = 1,245 × 714.10
  4. Step 4: Simplify right side
    901.20x = 889,054.50
  5. Step 5: Solve for x
    x = 889,054.50/901.20
  6. Step 6: Final answer
    x = 986.52

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Double scale
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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.