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Finding the Fourth Proportional to 530.94, 732.28 and 391.02

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Solution

The fourth proportional to 530.94, 732.28 and 391.02 is: 539.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.94 : 732.28 = 391.02 : x
  2. Step 2: Convert to fraction form
    530.94/732.28 = 391.02/x
  3. Step 3: Cross multiply
    530.94x = 732.28 × 391.02
  4. Step 4: Simplify right side
    530.94x = 286,336.13
  5. Step 5: Solve for x
    x = 286,336.13/530.94
  6. Step 6: Final answer
    x = 539.30

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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.