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Finding the Fourth Proportional to 526.75, 728.28 and 503.80

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Solution

The fourth proportional to 526.75, 728.28 and 503.80 is: 696.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.75 : 728.28 = 503.80 : x
  2. Step 2: Convert to fraction form
    526.75/728.28 = 503.80/x
  3. Step 3: Cross multiply
    526.75x = 728.28 × 503.80
  4. Step 4: Simplify right side
    526.75x = 366,907.46
  5. Step 5: Solve for x
    x = 366,907.46/526.75
  6. Step 6: Final answer
    x = 696.55

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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.