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Finding the Fourth Proportional to 528.17, 728.53 and 307.06

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Solution

The fourth proportional to 528.17, 728.53 and 307.06 is: 423.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.17 : 728.53 = 307.06 : x
  2. Step 2: Convert to fraction form
    528.17/728.53 = 307.06/x
  3. Step 3: Cross multiply
    528.17x = 728.53 × 307.06
  4. Step 4: Simplify right side
    528.17x = 223,699.83
  5. Step 5: Solve for x
    x = 223,699.83/528.17
  6. Step 6: Final answer
    x = 423.54

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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.