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Finding the Fourth Proportional to 387.33, 530.25 and 384.63

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Solution

The fourth proportional to 387.33, 530.25 and 384.63 is: 526.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.33 : 530.25 = 384.63 : x
  2. Step 2: Convert to fraction form
    387.33/530.25 = 384.63/x
  3. Step 3: Cross multiply
    387.33x = 530.25 × 384.63
  4. Step 4: Simplify right side
    387.33x = 203,948.13
  5. Step 5: Solve for x
    x = 203,948.13/387.33
  6. Step 6: Final answer
    x = 526.55

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.