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Finding the Fourth Proportional to 525.32, 724.72 and 328.76

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Solution

The fourth proportional to 525.32, 724.72 and 328.76 is: 453.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.32 : 724.72 = 328.76 : x
  2. Step 2: Convert to fraction form
    525.32/724.72 = 328.76/x
  3. Step 3: Cross multiply
    525.32x = 724.72 × 328.76
  4. Step 4: Simplify right side
    525.32x = 238,258.95
  5. Step 5: Solve for x
    x = 238,258.95/525.32
  6. Step 6: Final answer
    x = 453.55

Related Problems

Find fourth proportional to 262.66, 362.36 and 164.38
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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.