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Finding the Fourth Proportional to 525.75, 725.45 and 304.75

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Solution

The fourth proportional to 525.75, 725.45 and 304.75 is: 420.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.75 : 725.45 = 304.75 : x
  2. Step 2: Convert to fraction form
    525.75/725.45 = 304.75/x
  3. Step 3: Cross multiply
    525.75x = 725.45 × 304.75
  4. Step 4: Simplify right side
    525.75x = 221,080.89
  5. Step 5: Solve for x
    x = 221,080.89/525.75
  6. Step 6: Final answer
    x = 420.51

Related Problems

Find fourth proportional to 262.88, 362.73 and 152.38
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Double scale
Find fourth proportional to 526.75, 726.83 and 305.75
Similar ratio
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1.5x scale

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.