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Finding the Fourth Proportional to 530.51, 731.16 and 390.33

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Solution

The fourth proportional to 530.51, 731.16 and 390.33 is: 537.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.51 : 731.16 = 390.33 : x
  2. Step 2: Convert to fraction form
    530.51/731.16 = 390.33/x
  3. Step 3: Cross multiply
    530.51x = 731.16 × 390.33
  4. Step 4: Simplify right side
    530.51x = 285,393.68
  5. Step 5: Solve for x
    x = 285,393.68/530.51
  6. Step 6: Final answer
    x = 537.97

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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.