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Finding the Fourth Proportional to 901.42, 1,242.24 and 621.14

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Solution

The fourth proportional to 901.42, 1,242.24 and 621.14 is: 855.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.42 : 1,242.24 = 621.14 : x
  2. Step 2: Convert to fraction form
    901.42/1,242.24 = 621.14/x
  3. Step 3: Cross multiply
    901.42x = 1,242.24 × 621.14
  4. Step 4: Simplify right side
    901.42x = 771,606.89
  5. Step 5: Solve for x
    x = 771,606.89/901.42
  6. Step 6: Final answer
    x = 855.99

Related Problems

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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.