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Finding the Fourth Proportional to 764.02, 1,146.35 and 398.89

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Solution

The fourth proportional to 764.02, 1,146.35 and 398.89 is: 598.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.02 : 1,146.35 = 398.89 : x
  2. Step 2: Convert to fraction form
    764.02/1,146.35 = 398.89/x
  3. Step 3: Cross multiply
    764.02x = 1,146.35 × 398.89
  4. Step 4: Simplify right side
    764.02x = 457,267.55
  5. Step 5: Solve for x
    x = 457,267.55/764.02
  6. Step 6: Final answer
    x = 598.50

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.