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Finding the Fourth Proportional to 403.16, 603.36 and 257.00

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Solution

The fourth proportional to 403.16, 603.36 and 257.00 is: 384.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.16 : 603.36 = 257.00 : x
  2. Step 2: Convert to fraction form
    403.16/603.36 = 257.00/x
  3. Step 3: Cross multiply
    403.16x = 603.36 × 257.00
  4. Step 4: Simplify right side
    403.16x = 155,060.50
  5. Step 5: Solve for x
    x = 155,060.50/403.16
  6. Step 6: Final answer
    x = 384.62

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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.