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Finding the Fourth Proportional to 897.64, 1,238.52 and 548.08

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Solution

The fourth proportional to 897.64, 1,238.52 and 548.08 is: 756.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    897.64 : 1,238.52 = 548.08 : x
  2. Step 2: Convert to fraction form
    897.64/1,238.52 = 548.08/x
  3. Step 3: Cross multiply
    897.64x = 1,238.52 × 548.08
  4. Step 4: Simplify right side
    897.64x = 678,808.04
  5. Step 5: Solve for x
    x = 678,808.04/897.64
  6. Step 6: Final answer
    x = 756.21

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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.