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Finding the Fourth Proportional to 898.99, 1,240.53 and 500.59

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Solution

The fourth proportional to 898.99, 1,240.53 and 500.59 is: 690.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.99 : 1,240.53 = 500.59 : x
  2. Step 2: Convert to fraction form
    898.99/1,240.53 = 500.59/x
  3. Step 3: Cross multiply
    898.99x = 1,240.53 × 500.59
  4. Step 4: Simplify right side
    898.99x = 620,996.91
  5. Step 5: Solve for x
    x = 620,996.91/898.99
  6. Step 6: Final answer
    x = 690.77

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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.