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Finding the Fourth Proportional to 1,490.42, 2,238.62 and 898.63

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Solution

The fourth proportional to 1,490.42, 2,238.62 and 898.63 is: 1,349.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,490.42 : 2,238.62 = 898.63 : x
  2. Step 2: Convert to fraction form
    1,490.42/2,238.62 = 898.63/x
  3. Step 3: Cross multiply
    1,490.42x = 2,238.62 × 898.63
  4. Step 4: Simplify right side
    1,490.42x = 2,011,681.00
  5. Step 5: Solve for x
    x = 2,011,681.00/1,490.42
  6. Step 6: Final answer
    x = 1,349.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.