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Finding the Fourth Proportional to 525.02, 724.54 and 288.99

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Solution

The fourth proportional to 525.02, 724.54 and 288.99 is: 398.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.02 : 724.54 = 288.99 : x
  2. Step 2: Convert to fraction form
    525.02/724.54 = 288.99/x
  3. Step 3: Cross multiply
    525.02x = 724.54 × 288.99
  4. Step 4: Simplify right side
    525.02x = 209,384.81
  5. Step 5: Solve for x
    x = 209,384.81/525.02
  6. Step 6: Final answer
    x = 398.81

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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.