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Finding the Fourth Proportional to 898.02, 1,239.39 and 505.07

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Solution

The fourth proportional to 898.02, 1,239.39 and 505.07 is: 697.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.02 : 1,239.39 = 505.07 : x
  2. Step 2: Convert to fraction form
    898.02/1,239.39 = 505.07/x
  3. Step 3: Cross multiply
    898.02x = 1,239.39 × 505.07
  4. Step 4: Simplify right side
    898.02x = 625,969.99
  5. Step 5: Solve for x
    x = 625,969.99/898.02
  6. Step 6: Final answer
    x = 697.06

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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.