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Finding the Fourth Proportional to 897.38, 1,238.45 and 548.13

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Solution

The fourth proportional to 897.38, 1,238.45 and 548.13 is: 756.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    897.38 : 1,238.45 = 548.13 : x
  2. Step 2: Convert to fraction form
    897.38/1,238.45 = 548.13/x
  3. Step 3: Cross multiply
    897.38x = 1,238.45 × 548.13
  4. Step 4: Simplify right side
    897.38x = 678,828.86
  5. Step 5: Solve for x
    x = 678,828.86/897.38
  6. Step 6: Final answer
    x = 756.46

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Double scale
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1.5x scale

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.