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Finding the Fourth Proportional to 901.00, 1,242.26 and 621.24

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Solution

The fourth proportional to 901.00, 1,242.26 and 621.24 is: 856.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.00 : 1,242.26 = 621.24 : x
  2. Step 2: Convert to fraction form
    901.00/1,242.26 = 621.24/x
  3. Step 3: Cross multiply
    901.00x = 1,242.26 × 621.24
  4. Step 4: Simplify right side
    901.00x = 771,748.40
  5. Step 5: Solve for x
    x = 771,748.40/901.00
  6. Step 6: Final answer
    x = 856.55

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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.