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Finding the Fourth Proportional to 893.28, 1,339.88 and 530.38

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Solution

The fourth proportional to 893.28, 1,339.88 and 530.38 is: 795.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.28 : 1,339.88 = 530.38 : x
  2. Step 2: Convert to fraction form
    893.28/1,339.88 = 530.38/x
  3. Step 3: Cross multiply
    893.28x = 1,339.88 × 530.38
  4. Step 4: Simplify right side
    893.28x = 710,645.55
  5. Step 5: Solve for x
    x = 710,645.55/893.28
  6. Step 6: Final answer
    x = 795.55

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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.