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Finding the Fourth Proportional to 528.08, 724.80 and 478.88

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Solution

The fourth proportional to 528.08, 724.80 and 478.88 is: 657.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.08 : 724.80 = 478.88 : x
  2. Step 2: Convert to fraction form
    528.08/724.80 = 478.88/x
  3. Step 3: Cross multiply
    528.08x = 724.80 × 478.88
  4. Step 4: Simplify right side
    528.08x = 347,092.22
  5. Step 5: Solve for x
    x = 347,092.22/528.08
  6. Step 6: Final answer
    x = 657.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.