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Finding the Fourth Proportional to 468.84, 646.40 and 384.51

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Solution

The fourth proportional to 468.84, 646.40 and 384.51 is: 530.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    468.84 : 646.40 = 384.51 : x
  2. Step 2: Convert to fraction form
    468.84/646.40 = 384.51/x
  3. Step 3: Cross multiply
    468.84x = 646.40 × 384.51
  4. Step 4: Simplify right side
    468.84x = 248,542.11
  5. Step 5: Solve for x
    x = 248,542.11/468.84
  6. Step 6: Final answer
    x = 530.12

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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.