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Finding the Fourth Proportional to 603, 903.60 and 386.40

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Solution

The fourth proportional to 603, 903.60 and 386.40 is: 579.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    603 : 903.60 = 386.40 : x
  2. Step 2: Convert to fraction form
    603/903.60 = 386.40/x
  3. Step 3: Cross multiply
    603x = 903.60 × 386.40
  4. Step 4: Simplify right side
    603x = 349,151.04
  5. Step 5: Solve for x
    x = 349,151.04/603
  6. Step 6: Final answer
    x = 579.02

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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.