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Finding the Fourth Proportional to 528.72, 788.88 and 503.52

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Solution

The fourth proportional to 528.72, 788.88 and 503.52 is: 751.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.72 : 788.88 = 503.52 : x
  2. Step 2: Convert to fraction form
    528.72/788.88 = 503.52/x
  3. Step 3: Cross multiply
    528.72x = 788.88 × 503.52
  4. Step 4: Simplify right side
    528.72x = 397,216.86
  5. Step 5: Solve for x
    x = 397,216.86/528.72
  6. Step 6: Final answer
    x = 751.28

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.